Franc[e]sco/lolisamurai, for oppai, used as standard pp calculator.
oppai is licensed under GPL v3. Their implementation can be found here and Ripple's implementation can be found here.
cmyui, for oppai-rx, used as Relax pp calculator.
oppai is licensed under GPL v3. Their implementation can be found here.
Tom94, for osu-performance, used as a reference for our mania pp calculator.
osu-performance is licensed under AGPL v3. Ripple's implementation can be found here.
Sunpy, for catch-the-pp used as catch the beat pp calculator and the setup for installing this Ripple instance.
catch-the-pp is licensed under GPL v3. Our implementation can be found here.
jrosdahl, for miniircd, used as a base for our IRC server.
miniircd is licensed under GPL v2. Our implementation can be found here.
Cherry, for extra beatmap system and help on this server.
Everyone who has supported Datenshi and the Ripple project by donating or inviting other people.