DarkRP, a non-serious roleplay gamemode for Garry's Mod.
Profiler for Garry's Mod.
GMod Lua syntax highlighting for Sublime Text 2 and 3
This is the addon with which you can modify DarkRP. Do not edit DarkRP files, edit files in this addon instead.
Garry's mod workshop cli powertool. It should still work, but support has been dropped because of the effort it takes to compile this.
Falco's prop protection