Firepad - Open source collaborative code and text editing that relies on Firebase for real-time data...
iRewardHealth - Motivating healthy behavior change
CryptPad - CryptPad is a collaborative office suite that is end-to-end encrypted and open-source.
Physio Health - Stay healthy, get rewards.
eduPad - Real-time collaborative text-editor. No account required. Edits highlighted in authors color.
Tep - Fitness tracker meets tamagotchi. Don't starve it!