OldDays, NBXlite and SpawnHuman return old things that were removed. NBXlite is fork of InsanityBringer's NoBiomesX.
SSPC is a fork of simo_415's Single Player Commands 3.2.2. Everything in src/client/spc, bin/spc- and bin-old/spc- is licenced under GNU LGPLv3.
To set this up:
Download MCP.
Decompile client using MCP.
Clone this repository to src-mods directory.
Go to src-mods/build and run deploy.sh script. (Or deploy.bat if you use Windows)
It is ready. You may now recompile client and start it.
To build a release, run make.sh script in the MCP directory. Not from src-mods/build! Resulting zips will be in reobf/result2.
build/ln.exe source code can be found here: https://github.com/neosmart/ln-win