Below is a non-exhaustive, non-official list of player commands from plugins we run. Note all functionalities may not be available:
EditableSign
EssentialsX
- https://www.spigotmc.org/resources/essentialsx.9089/ (Plugin page)
- Improvements - EssentialsX Wiki (Official Wiki)
- EssentialsX Info - Commands (Community Maintained Commands list)
Fungee Commands
- https://github.com/OpenRedstoneEngineers/FungeeCommands/blob/master/fungee-manager/src/main/resources/commands.json
- https://github.com/OpenRedstoneEngineers/FungeeCommands/blob/master/fungee-manager/src/main/resources/derps.txt