diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 579289440e..a2dfbeaa48 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -610,9 +610,10 @@ file( GLOB HEADER_FILES
 	win32/*.h
 	r_data/*.h
 	r_data/models/*.h
-	utility/rapidjson/*.h
+	common/thirdparty/*.h
+	common/thirdparty/rapidjson/*.h
+	common/thirdparty/math./*h
 	utility/sfmt/*.h
-	utility/math./*h
 	utility/*.h
 	scripting/*.h
 	scripting/backend/*.h
@@ -1127,8 +1128,6 @@ set (PCH_SOURCES
 	utility/m_png.cpp
 	utility/m_random.cpp
 	utility/memarena.cpp
-	utility/md5.cpp
-	utility/superfasthash.cpp
 	utility/nodebuilder/nodebuild.cpp
 	utility/nodebuilder/nodebuild_classify_nosse2.cpp
 	utility/nodebuilder/nodebuild_events.cpp
@@ -1148,6 +1147,8 @@ set (PCH_SOURCES
 	utility/v_collection.cpp
 	utility/utf8.cpp
 	utility/zstrformat.cpp
+	common/thirdparty/md5.cpp
+ 	common/thirdparty/superfasthash.cpp
 )
 
 if( ${HAVE_VM_JIT} )
@@ -1171,26 +1172,26 @@ add_executable( zdoom WIN32 MACOSX_BUNDLE
 	${FASTMATH_SOURCES}
 	${PCH_SOURCES}
 	utility/x86.cpp
-	utility/strnatcmp.c
+	common/thirdparty/strnatcmp.c
 	utility/zstring.cpp
-	utility/math/asin.c
-	utility/math/atan.c
-	utility/math/const.c
-	utility/math/cosh.c
-	utility/math/exp.c
-	utility/math/isnan.c
-	utility/math/log.c
-	utility/math/log10.c
-	utility/math/mtherr.c
-	utility/math/polevl.c
-	utility/math/pow.c
-	utility/math/powi.c
-	utility/math/sin.c
-	utility/math/sinh.c
-	utility/math/sqrt.c
-	utility/math/tan.c
-	utility/math/tanh.c
-	utility/math/fastsin.cpp
+	common/thirdparty/math/asin.c
+	common/thirdparty/math/atan.c
+	common/thirdparty/math/const.c
+	common/thirdparty/math/cosh.c
+	common/thirdparty/math/exp.c
+	common/thirdparty/math/isnan.c
+	common/thirdparty/math/log.c
+	common/thirdparty/math/log10.c
+	common/thirdparty/math/mtherr.c
+	common/thirdparty/math/polevl.c
+	common/thirdparty/math/pow.c
+	common/thirdparty/math/powi.c
+	common/thirdparty/math/sin.c
+	common/thirdparty/math/sinh.c
+	common/thirdparty/math/sqrt.c
+	common/thirdparty/math/tan.c
+	common/thirdparty/math/tanh.c
+	common/thirdparty/math/fastsin.cpp
 	zzautozend.cpp
 )
 
@@ -1215,6 +1216,7 @@ endif()
 target_link_libraries( zdoom ${ZDOOM_LIBS} gdtoa lzma ${ZMUSIC_LIBRARIES} )
 
 include_directories( .
+	common/thirdparty
 	g_statusbar
 	console
 	playsim
@@ -1353,6 +1355,7 @@ source_group("Game Data\\Textures\\Formats" REGULAR_EXPRESSION "^${CMAKE_CURRENT
 source_group("Intermission" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/intermission/.+")
 source_group("Map Loader" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/maploader/.+")
 source_group("Menu" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/menu/.+")
+source_group("Console" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/console/.+")
 source_group("Playsim" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/playsim/.+")
 source_group("Playsim\\Bots" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/playsim/bots/.+")
 source_group("Playsim\\FraggleScript" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/playsim/fragglescript/.+")
@@ -1413,10 +1416,12 @@ source_group("Scripting\\ZScript frontend" REGULAR_EXPRESSION "^${CMAKE_CURRENT_
 source_group("Scripting\\Compiler backend" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/scripting/backend/.+")
 source_group("Scripting\\VM" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/scripting/vm/.+")
 source_group("Scripting" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/scripting/.+")
+source_group("Common" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/common/.+")
+source_group("Common\\Third Party" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/common/thirdparty/.+")
+source_group("Common\\Third Party\\Math" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/common/thirdparty/math/.+")
+source_group("Common\\Third Party\\RapidJSON" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/common/thirdparty/rapidjson/.+")
 source_group("Utility" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/utility/.+")
 source_group("Utility\\Node Builder" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/utility/nodebuilder/.+")
-source_group("Utility\\Math" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/utility/math/.+")
-source_group("Utility\\RapidJSON" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/utility/rapidjson/.+")
 source_group("Utility\\SFMT" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/utility/sfmt/.+")
 source_group("Statusbar" REGULAR_EXPRESSION "^${CMAKE_CURRENT_SOURCE_DIR}/g_statusbar/.+")
 source_group("Versioning" FILES version.h win32/zdoom.rc)
diff --git a/src/utility/ctpl.h b/src/common/thirdparty/ctpl.h
similarity index 100%
rename from src/utility/ctpl.h
rename to src/common/thirdparty/ctpl.h
diff --git a/src/utility/earcut.hpp b/src/common/thirdparty/earcut.hpp
similarity index 100%
rename from src/utility/earcut.hpp
rename to src/common/thirdparty/earcut.hpp
diff --git a/src/utility/m_crc32.h b/src/common/thirdparty/m_crc32.h
similarity index 100%
rename from src/utility/m_crc32.h
rename to src/common/thirdparty/m_crc32.h
diff --git a/src/utility/math/asin.c b/src/common/thirdparty/math/asin.c
similarity index 100%
rename from src/utility/math/asin.c
rename to src/common/thirdparty/math/asin.c
diff --git a/src/utility/math/atan.c b/src/common/thirdparty/math/atan.c
similarity index 100%
rename from src/utility/math/atan.c
rename to src/common/thirdparty/math/atan.c
diff --git a/src/utility/math/cmath.h b/src/common/thirdparty/math/cmath.h
similarity index 100%
rename from src/utility/math/cmath.h
rename to src/common/thirdparty/math/cmath.h
diff --git a/src/utility/math/const.c b/src/common/thirdparty/math/const.c
similarity index 100%
rename from src/utility/math/const.c
rename to src/common/thirdparty/math/const.c
diff --git a/src/utility/math/cosh.c b/src/common/thirdparty/math/cosh.c
similarity index 100%
rename from src/utility/math/cosh.c
rename to src/common/thirdparty/math/cosh.c
diff --git a/src/utility/math/exp.c b/src/common/thirdparty/math/exp.c
similarity index 100%
rename from src/utility/math/exp.c
rename to src/common/thirdparty/math/exp.c
diff --git a/src/utility/math/fastsin.cpp b/src/common/thirdparty/math/fastsin.cpp
similarity index 100%
rename from src/utility/math/fastsin.cpp
rename to src/common/thirdparty/math/fastsin.cpp
diff --git a/src/utility/math/isnan.c b/src/common/thirdparty/math/isnan.c
similarity index 100%
rename from src/utility/math/isnan.c
rename to src/common/thirdparty/math/isnan.c
diff --git a/src/utility/math/log.c b/src/common/thirdparty/math/log.c
similarity index 100%
rename from src/utility/math/log.c
rename to src/common/thirdparty/math/log.c
diff --git a/src/utility/math/log10.c b/src/common/thirdparty/math/log10.c
similarity index 100%
rename from src/utility/math/log10.c
rename to src/common/thirdparty/math/log10.c
diff --git a/src/utility/math/mconf.h b/src/common/thirdparty/math/mconf.h
similarity index 100%
rename from src/utility/math/mconf.h
rename to src/common/thirdparty/math/mconf.h
diff --git a/src/utility/math/mtherr.c b/src/common/thirdparty/math/mtherr.c
similarity index 100%
rename from src/utility/math/mtherr.c
rename to src/common/thirdparty/math/mtherr.c
diff --git a/src/utility/math/polevl.c b/src/common/thirdparty/math/polevl.c
similarity index 100%
rename from src/utility/math/polevl.c
rename to src/common/thirdparty/math/polevl.c
diff --git a/src/utility/math/pow.c b/src/common/thirdparty/math/pow.c
similarity index 100%
rename from src/utility/math/pow.c
rename to src/common/thirdparty/math/pow.c
diff --git a/src/utility/math/powi.c b/src/common/thirdparty/math/powi.c
similarity index 100%
rename from src/utility/math/powi.c
rename to src/common/thirdparty/math/powi.c
diff --git a/src/utility/math/sin.c b/src/common/thirdparty/math/sin.c
similarity index 100%
rename from src/utility/math/sin.c
rename to src/common/thirdparty/math/sin.c
diff --git a/src/utility/math/sinh.c b/src/common/thirdparty/math/sinh.c
similarity index 100%
rename from src/utility/math/sinh.c
rename to src/common/thirdparty/math/sinh.c
diff --git a/src/utility/math/sqrt.c b/src/common/thirdparty/math/sqrt.c
similarity index 100%
rename from src/utility/math/sqrt.c
rename to src/common/thirdparty/math/sqrt.c
diff --git a/src/utility/math/tan.c b/src/common/thirdparty/math/tan.c
similarity index 100%
rename from src/utility/math/tan.c
rename to src/common/thirdparty/math/tan.c
diff --git a/src/utility/math/tanh.c b/src/common/thirdparty/math/tanh.c
similarity index 100%
rename from src/utility/math/tanh.c
rename to src/common/thirdparty/math/tanh.c
diff --git a/src/utility/md5.cpp b/src/common/thirdparty/md5.cpp
similarity index 86%
rename from src/utility/md5.cpp
rename to src/common/thirdparty/md5.cpp
index 1e0f724404..c2f90cdbc1 100644
--- a/src/utility/md5.cpp
+++ b/src/common/thirdparty/md5.cpp
@@ -16,11 +16,9 @@
  */
 
 #include <string.h>		/* for memcpy() */
+#include <algorithm>
 
-#include "doomtype.h"
 #include "md5.h"
-#include "templates.h"
-#include "files.h"
 
 #ifdef __BIG_ENDIAN__
 void byteSwap(uint32_t *buf, unsigned words)
@@ -95,20 +93,6 @@ void MD5Context::Update(const uint8_t *buf, unsigned len)
 	memcpy(in, buf, len);
 }
 
-void MD5Context::Update(FileReader &file, unsigned len)
-{
-	uint8_t readbuf[8192];
-	long t;
-
-	while (len > 0)
-	{
-		t = MIN<long>(len, sizeof(readbuf));
-		len -= t;
-		t = (long)file.Read(readbuf, t);
-		Update(readbuf, t);
-	}
-}
-
 /*
  * Final wrapup - pad to 64-byte boundary with the bit pattern 
  * 1 0* (64-bit count of bits processed, MSB-first)
@@ -250,46 +234,3 @@ MD5Transform(uint32_t buf[4], const uint32_t in[16])
 
 #endif
 
-//==========================================================================
-//
-// CCMD md5sum
-//
-// Like the command-line tool, because I wanted to make sure I had it right.
-//
-//==========================================================================
-
-#include "c_dispatch.h"
-#include <errno.h>
-
-CCMD (md5sum)
-{
-	if (argv.argc() < 2)
-	{
-		Printf("Usage: md5sum <file> ...\n");
-	}
-	for (int i = 1; i < argv.argc(); ++i)
-	{
-		FileReader fr;
-		if (!fr.OpenFile(argv[i]))
-		{
-			Printf("%s: %s\n", argv[i], strerror(errno));
-		}
-		else
-		{
-			MD5Context md5;
-			uint8_t readbuf[8192];
-			size_t len;
-
-			while ((len = fr.Read(readbuf, sizeof(readbuf))) > 0)
-			{
-				md5.Update(readbuf, (unsigned int)len);
-			}
-			md5.Final(readbuf);
-			for(int j = 0; j < 16; ++j)
-			{
-				Printf("%02x", readbuf[j]);
-			}
-			Printf(" *%s\n", argv[i]);
-		}
-	}
-}
diff --git a/src/utility/md5.h b/src/common/thirdparty/md5.h
similarity index 94%
rename from src/utility/md5.h
rename to src/common/thirdparty/md5.h
index 82d4f32dc1..f3aab94d96 100644
--- a/src/utility/md5.h
+++ b/src/common/thirdparty/md5.h
@@ -18,15 +18,12 @@
 #ifndef MD5_H
 #define MD5_H
 
-class FileReader;
-
 struct MD5Context
 {
 	MD5Context() { Init(); }
 
 	void Init();
 	void Update(const uint8_t *buf, unsigned len);
-	void Update(FileReader &file, unsigned len);
 	void Final(uint8_t digest[16]);
 
 private:
diff --git a/src/utility/rapidjson/allocators.h b/src/common/thirdparty/rapidjson/allocators.h
similarity index 100%
rename from src/utility/rapidjson/allocators.h
rename to src/common/thirdparty/rapidjson/allocators.h
diff --git a/src/utility/rapidjson/document.h b/src/common/thirdparty/rapidjson/document.h
similarity index 100%
rename from src/utility/rapidjson/document.h
rename to src/common/thirdparty/rapidjson/document.h
diff --git a/src/utility/rapidjson/encodedstream.h b/src/common/thirdparty/rapidjson/encodedstream.h
similarity index 100%
rename from src/utility/rapidjson/encodedstream.h
rename to src/common/thirdparty/rapidjson/encodedstream.h
diff --git a/src/utility/rapidjson/encodings.h b/src/common/thirdparty/rapidjson/encodings.h
similarity index 100%
rename from src/utility/rapidjson/encodings.h
rename to src/common/thirdparty/rapidjson/encodings.h
diff --git a/src/utility/rapidjson/error/en.h b/src/common/thirdparty/rapidjson/error/en.h
similarity index 100%
rename from src/utility/rapidjson/error/en.h
rename to src/common/thirdparty/rapidjson/error/en.h
diff --git a/src/utility/rapidjson/error/error.h b/src/common/thirdparty/rapidjson/error/error.h
similarity index 100%
rename from src/utility/rapidjson/error/error.h
rename to src/common/thirdparty/rapidjson/error/error.h
diff --git a/src/utility/rapidjson/filereadstream.h b/src/common/thirdparty/rapidjson/filereadstream.h
similarity index 100%
rename from src/utility/rapidjson/filereadstream.h
rename to src/common/thirdparty/rapidjson/filereadstream.h
diff --git a/src/utility/rapidjson/filewritestream.h b/src/common/thirdparty/rapidjson/filewritestream.h
similarity index 100%
rename from src/utility/rapidjson/filewritestream.h
rename to src/common/thirdparty/rapidjson/filewritestream.h
diff --git a/src/utility/rapidjson/fwd.h b/src/common/thirdparty/rapidjson/fwd.h
similarity index 100%
rename from src/utility/rapidjson/fwd.h
rename to src/common/thirdparty/rapidjson/fwd.h
diff --git a/src/utility/rapidjson/internal/biginteger.h b/src/common/thirdparty/rapidjson/internal/biginteger.h
similarity index 100%
rename from src/utility/rapidjson/internal/biginteger.h
rename to src/common/thirdparty/rapidjson/internal/biginteger.h
diff --git a/src/utility/rapidjson/internal/diyfp.h b/src/common/thirdparty/rapidjson/internal/diyfp.h
similarity index 100%
rename from src/utility/rapidjson/internal/diyfp.h
rename to src/common/thirdparty/rapidjson/internal/diyfp.h
diff --git a/src/utility/rapidjson/internal/dtoa.h b/src/common/thirdparty/rapidjson/internal/dtoa.h
similarity index 100%
rename from src/utility/rapidjson/internal/dtoa.h
rename to src/common/thirdparty/rapidjson/internal/dtoa.h
diff --git a/src/utility/rapidjson/internal/ieee754.h b/src/common/thirdparty/rapidjson/internal/ieee754.h
similarity index 100%
rename from src/utility/rapidjson/internal/ieee754.h
rename to src/common/thirdparty/rapidjson/internal/ieee754.h
diff --git a/src/utility/rapidjson/internal/itoa.h b/src/common/thirdparty/rapidjson/internal/itoa.h
similarity index 100%
rename from src/utility/rapidjson/internal/itoa.h
rename to src/common/thirdparty/rapidjson/internal/itoa.h
diff --git a/src/utility/rapidjson/internal/meta.h b/src/common/thirdparty/rapidjson/internal/meta.h
similarity index 100%
rename from src/utility/rapidjson/internal/meta.h
rename to src/common/thirdparty/rapidjson/internal/meta.h
diff --git a/src/utility/rapidjson/internal/pow10.h b/src/common/thirdparty/rapidjson/internal/pow10.h
similarity index 100%
rename from src/utility/rapidjson/internal/pow10.h
rename to src/common/thirdparty/rapidjson/internal/pow10.h
diff --git a/src/utility/rapidjson/internal/regex.h b/src/common/thirdparty/rapidjson/internal/regex.h
similarity index 100%
rename from src/utility/rapidjson/internal/regex.h
rename to src/common/thirdparty/rapidjson/internal/regex.h
diff --git a/src/utility/rapidjson/internal/stack.h b/src/common/thirdparty/rapidjson/internal/stack.h
similarity index 100%
rename from src/utility/rapidjson/internal/stack.h
rename to src/common/thirdparty/rapidjson/internal/stack.h
diff --git a/src/utility/rapidjson/internal/strfunc.h b/src/common/thirdparty/rapidjson/internal/strfunc.h
similarity index 100%
rename from src/utility/rapidjson/internal/strfunc.h
rename to src/common/thirdparty/rapidjson/internal/strfunc.h
diff --git a/src/utility/rapidjson/internal/strtod.h b/src/common/thirdparty/rapidjson/internal/strtod.h
similarity index 100%
rename from src/utility/rapidjson/internal/strtod.h
rename to src/common/thirdparty/rapidjson/internal/strtod.h
diff --git a/src/utility/rapidjson/internal/swap.h b/src/common/thirdparty/rapidjson/internal/swap.h
similarity index 100%
rename from src/utility/rapidjson/internal/swap.h
rename to src/common/thirdparty/rapidjson/internal/swap.h
diff --git a/src/utility/rapidjson/istreamwrapper.h b/src/common/thirdparty/rapidjson/istreamwrapper.h
similarity index 100%
rename from src/utility/rapidjson/istreamwrapper.h
rename to src/common/thirdparty/rapidjson/istreamwrapper.h
diff --git a/src/utility/rapidjson/memorybuffer.h b/src/common/thirdparty/rapidjson/memorybuffer.h
similarity index 100%
rename from src/utility/rapidjson/memorybuffer.h
rename to src/common/thirdparty/rapidjson/memorybuffer.h
diff --git a/src/utility/rapidjson/memorystream.h b/src/common/thirdparty/rapidjson/memorystream.h
similarity index 100%
rename from src/utility/rapidjson/memorystream.h
rename to src/common/thirdparty/rapidjson/memorystream.h
diff --git a/src/utility/rapidjson/msinttypes/inttypes.h b/src/common/thirdparty/rapidjson/msinttypes/inttypes.h
similarity index 100%
rename from src/utility/rapidjson/msinttypes/inttypes.h
rename to src/common/thirdparty/rapidjson/msinttypes/inttypes.h
diff --git a/src/utility/rapidjson/msinttypes/stdint.h b/src/common/thirdparty/rapidjson/msinttypes/stdint.h
similarity index 100%
rename from src/utility/rapidjson/msinttypes/stdint.h
rename to src/common/thirdparty/rapidjson/msinttypes/stdint.h
diff --git a/src/utility/rapidjson/ostreamwrapper.h b/src/common/thirdparty/rapidjson/ostreamwrapper.h
similarity index 100%
rename from src/utility/rapidjson/ostreamwrapper.h
rename to src/common/thirdparty/rapidjson/ostreamwrapper.h
diff --git a/src/utility/rapidjson/pointer.h b/src/common/thirdparty/rapidjson/pointer.h
similarity index 100%
rename from src/utility/rapidjson/pointer.h
rename to src/common/thirdparty/rapidjson/pointer.h
diff --git a/src/utility/rapidjson/prettywriter.h b/src/common/thirdparty/rapidjson/prettywriter.h
similarity index 100%
rename from src/utility/rapidjson/prettywriter.h
rename to src/common/thirdparty/rapidjson/prettywriter.h
diff --git a/src/utility/rapidjson/rapidjson.h b/src/common/thirdparty/rapidjson/rapidjson.h
similarity index 100%
rename from src/utility/rapidjson/rapidjson.h
rename to src/common/thirdparty/rapidjson/rapidjson.h
diff --git a/src/utility/rapidjson/reader.h b/src/common/thirdparty/rapidjson/reader.h
similarity index 100%
rename from src/utility/rapidjson/reader.h
rename to src/common/thirdparty/rapidjson/reader.h
diff --git a/src/utility/rapidjson/schema.h b/src/common/thirdparty/rapidjson/schema.h
similarity index 100%
rename from src/utility/rapidjson/schema.h
rename to src/common/thirdparty/rapidjson/schema.h
diff --git a/src/utility/rapidjson/stream.h b/src/common/thirdparty/rapidjson/stream.h
similarity index 100%
rename from src/utility/rapidjson/stream.h
rename to src/common/thirdparty/rapidjson/stream.h
diff --git a/src/utility/rapidjson/stringbuffer.h b/src/common/thirdparty/rapidjson/stringbuffer.h
similarity index 100%
rename from src/utility/rapidjson/stringbuffer.h
rename to src/common/thirdparty/rapidjson/stringbuffer.h
diff --git a/src/utility/rapidjson/writer.h b/src/common/thirdparty/rapidjson/writer.h
similarity index 100%
rename from src/utility/rapidjson/writer.h
rename to src/common/thirdparty/rapidjson/writer.h
diff --git a/src/utility/strnatcmp.c b/src/common/thirdparty/strnatcmp.c
similarity index 100%
rename from src/utility/strnatcmp.c
rename to src/common/thirdparty/strnatcmp.c
diff --git a/src/utility/strnatcmp.h b/src/common/thirdparty/strnatcmp.h
similarity index 100%
rename from src/utility/strnatcmp.h
rename to src/common/thirdparty/strnatcmp.h
diff --git a/src/utility/superfasthash.cpp b/src/common/thirdparty/superfasthash.cpp
similarity index 100%
rename from src/utility/superfasthash.cpp
rename to src/common/thirdparty/superfasthash.cpp
diff --git a/src/utility/superfasthash.h b/src/common/thirdparty/superfasthash.h
similarity index 100%
rename from src/utility/superfasthash.h
rename to src/common/thirdparty/superfasthash.h
diff --git a/src/utility/xs_Float.h b/src/common/thirdparty/xs_Float.h
similarity index 100%
rename from src/utility/xs_Float.h
rename to src/common/thirdparty/xs_Float.h
diff --git a/src/console/c_cmds.cpp b/src/console/c_cmds.cpp
index 711bcf3b81..601b50c7db 100644
--- a/src/console/c_cmds.cpp
+++ b/src/console/c_cmds.cpp
@@ -35,6 +35,7 @@
 #include <math.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <errno.h>
 
 #ifdef _WIN32
 #include <direct.h>
@@ -68,6 +69,7 @@
 #include "c_functions.h"
 #include "g_levellocals.h"
 #include "v_video.h"
+#include "md5.h"
 
 extern FILE *Logfile;
 extern bool insave;
@@ -1303,3 +1305,45 @@ CCMD(r_showcaps)
 	PRINT_CAP("Truecolor Enabled", RFF_TRUECOLOR)
 	PRINT_CAP("Voxels", RFF_VOXELS)
 }
+
+
+//==========================================================================
+//
+// CCMD md5sum
+//
+// Like the command-line tool, because I wanted to make sure I had it right.
+//
+//==========================================================================
+
+CCMD (md5sum)
+{
+	if (argv.argc() < 2)
+	{
+		Printf("Usage: md5sum <file> ...\n");
+	}
+	for (int i = 1; i < argv.argc(); ++i)
+	{
+		FileReader fr;
+		if (!fr.OpenFile(argv[i]))
+		{
+			Printf("%s: %s\n", argv[i], strerror(errno));
+		}
+		else
+		{
+			MD5Context md5;
+			uint8_t readbuf[8192];
+			size_t len;
+
+			while ((len = fr.Read(readbuf, sizeof(readbuf))) > 0)
+			{
+				md5.Update(readbuf, (unsigned int)len);
+			}
+			md5.Final(readbuf);
+			for(int j = 0; j < 16; ++j)
+			{
+				Printf("%02x", readbuf[j]);
+			}
+			Printf(" *%s\n", argv[i]);
+		}
+	}
+}
diff --git a/src/d_main.cpp b/src/d_main.cpp
index 3a45e34ced..49792c7f91 100644
--- a/src/d_main.cpp
+++ b/src/d_main.cpp
@@ -2662,6 +2662,7 @@ static int D_DoomMain_Internal (void)
 		C_InitConback();
 
 		StartScreen->Progress();
+		palMgr.Init(NUM_TRANSLATION_TABLES);
 		V_InitFonts();
 
 		// [CW] Parse any TEAMINFO lumps.
diff --git a/src/gamedata/w_wad.cpp b/src/gamedata/w_wad.cpp
index 9592683503..52221bdf88 100644
--- a/src/gamedata/w_wad.cpp
+++ b/src/gamedata/w_wad.cpp
@@ -83,6 +83,21 @@ FWadCollection Wads;
 
 // CODE --------------------------------------------------------------------
 
+void md5Update(FileReader& file, MD5Context &md5, unsigned len)
+{
+	uint8_t readbuf[8192];
+	unsigned t;
+
+	while (len > 0)
+	{
+		t = std::min<unsigned>(len, sizeof(readbuf));
+		len -= t;
+		t = (long)file.Read(readbuf, t);
+		md5.Update(readbuf, t);
+	}
+}
+
+
 //==========================================================================
 //
 // uppercoppy
@@ -282,7 +297,7 @@ void FWadCollection::AddFile (const char *filename, FileReader *wadr)
 			{
 				MD5Context md5;
 				wadreader.Seek(0, FileReader::SeekSet);
-				md5.Update(wadreader, (unsigned)wadreader.GetLength());
+				md5Update(wadreader, md5, (unsigned)wadreader.GetLength());
 				md5.Final(cksum);
 
 				for (size_t j = 0; j < sizeof(cksum); ++j)
@@ -304,7 +319,7 @@ void FWadCollection::AddFile (const char *filename, FileReader *wadr)
 				{
 					MD5Context md5;
 					auto reader = lump->NewReader();
-					md5.Update(reader, lump->LumpSize);
+					md5Update(reader, md5, lump->LumpSize);
 					md5.Final(cksum);
 
 					for (size_t j = 0; j < sizeof(cksum); ++j)
@@ -966,7 +981,7 @@ void FWadCollection::RenameNerve ()
 		}
 		fr->Seek(0, FileReader::SeekSet);
 		MD5Context md5;
-		md5.Update(*fr, (unsigned)fr->GetLength());
+		md5Update(*fr, md5, (unsigned)fr->GetLength());
 		md5.Final(cksum);
 		if (memcmp(nerve[isizecheck], cksum, 16) == 0)
 		{
@@ -1033,7 +1048,7 @@ void FWadCollection::FixMacHexen()
 	uint8_t checksum[16];
 	MD5Context md5;
 
-	md5.Update(*reader, (unsigned)iwadSize);
+	md5Update(*reader, md5, (unsigned)iwadSize);
 	md5.Final(checksum);
 
 	static const uint8_t HEXEN_DEMO_MD5[16] =
diff --git a/src/p_openmap.cpp b/src/p_openmap.cpp
index 765d91797d..efb8571e50 100644
--- a/src/p_openmap.cpp
+++ b/src/p_openmap.cpp
@@ -41,6 +41,8 @@
 #include "md5.h"
 #include "g_levellocals.h"
 
+void md5Update(FileReader& file, MD5Context& md5, unsigned len);
+
 inline bool P_IsBuildMap(MapData *map)
 {
 	return false;
@@ -395,19 +397,19 @@ void MapData::GetChecksum(uint8_t cksum[16])
 
 	if (isText)
 	{
-		md5.Update(Reader(ML_TEXTMAP), Size(ML_TEXTMAP));
+		md5Update(Reader(ML_TEXTMAP), md5, Size(ML_TEXTMAP));
 	}
 	else
 	{
-		md5.Update(Reader(ML_LABEL), Size(ML_LABEL));
-		md5.Update(Reader(ML_THINGS), Size(ML_THINGS));
-		md5.Update(Reader(ML_LINEDEFS), Size(ML_LINEDEFS));
-		md5.Update(Reader(ML_SIDEDEFS), Size(ML_SIDEDEFS));
-		md5.Update(Reader(ML_SECTORS), Size(ML_SECTORS));
+		md5Update(Reader(ML_LABEL), md5, Size(ML_LABEL));
+		md5Update(Reader(ML_THINGS), md5, Size(ML_THINGS));
+		md5Update(Reader(ML_LINEDEFS), md5, Size(ML_LINEDEFS));
+		md5Update(Reader(ML_SIDEDEFS), md5, Size(ML_SIDEDEFS));
+		md5Update(Reader(ML_SECTORS), md5, Size(ML_SECTORS));
 	}
 	if (HasBehavior)
 	{
-		md5.Update(Reader(ML_BEHAVIOR), Size(ML_BEHAVIOR));
+		md5Update(Reader(ML_BEHAVIOR), md5, Size(ML_BEHAVIOR));
 	}
 	md5.Final(cksum);
 }