SRB2 Master Server
SOC Editor
wadzip utility
Sonic Robo Blast 2 Public
Utility to automatically tag music lumps with LENGTHMS
A level editor for SRB2, forked from GZDoom Builder.
SRB2 Kart Public
Benchmarking tool for SRB2
https://mb.srb2.org/showthread.php?t=38088
Unofficial record attack leaderboards for SRB2Kart