YellowAfterlife's GameMaker Tools's repositories
GmlCppExtFuncs
Auto-generates GML<->C++ interop code
GMVisualizer
Formatted output and operations over GameMaker's "object information"
GMVitalizer
Tries its best to convert your GMS2 projects into GMS1 projects
GmxDataSync
Extracts matching sprite/sound/background/font assets from a data.win into a GameMaker: Studio project. Mostly intended for distributing a game's source code without having to distribute assets with it.
YYDebugView
A small tool for viewing code inside .yydebug files generated by GameMaker when running from IDE. Intended for code recovery.
BMFontToGMFont
Converts BMFont-format fonts into GMS/GMS2 font resources
YYTextureView
A tool for exploring textures in GameMaker games
extension-gmx-to-gm8
Partially converts GameMaker: Studio extensions to series of GML scripts for use with GameMaker≤8.1
extension-yy-to-gmx
[very partially] convert GameMaker Studio 2 extensions to GameMaker: Studio format