repost by vergilet

Ruby gem for validating form data. Maintained by readysteady on GitHub, where it has earned 76 stars from the community.

A modern modular service object toolkit for Rails, that respects database transactions and adds type checks to returned values. Maintained by DmitryTsepelev on GitHub, where it has earned 80 stars from the community.

The guide to build a Rails app from a to z. Maintained by jp7io on GitHub, where it has earned 75 stars from the community.