RetroMCP is a tool which makes decompiling legacy Minecraft simple
Github page
Check the wiki
Version mappings
Download latest
MCPHackers' LaunchWrapper for legacy Minecraft
Github page
RetroDebugInjector (RDI) is a Java bytecode manipulation utility
Github page
No builds available
(Although you can build it from source)
MCPHackers' fork of Enigma
Github page
No builds available
(Although you can build it from source)