associationist by onyxblade

Microscope adds useful scopes targeting ActiveRecord boolean, date and datetime fields. Maintained by mirego on GitHub, where it has earned 61 stars from the community.

I'm feeling lucky!. Maintained by JuanitoFatas on GitHub, where it has earned 63 stars from the community.

Some ActiveModel/ActiveRecord validators. Maintained by fnando on GitHub, where it has earned 97 stars from the community.