- KaiAuth https://www.reddit.com/r/KaiOS/comments/ft0jjn/kaiauth_simpl...
- GAuth by gbrad (https://kaptein.me/blog/porting-converting-web-apps-website-...)
- https://github.com/fwenzel/firekey
For some reason, when the KaiAuth developer tried to submit it into the KaiOS app store, KaiOStech rejected it because it doesn't "match the use case for majority of our users".