authentication-zero by lazaronixon

Simple (and safe*) token authentication for Rails apps or API with Devise. Maintained by gonzalo-bulnes on GitHub, where it has earned 1,505 stars from the community.

Magical authentication for Rails 3 & 4. Maintained by NoamB on GitHub, where it has earned 2,300 stars from the community.

An authentication generator for Rails 7. Generate all the files needed to create a feature rich authentication system that you control. No configuration needed. Maintained by stevepolitodesign on GitHub, where it has earned 78 stars from the community.