yeet_dba by KevinColemanInc

lol_dba is a small package of rake tasks that scan your application models and displays a list of columns that probably should be indexed. Also, it can generate.sql migration scripts. Maintained by plentz on GitHub, where it has earned 1,594 stars from the community.

Manage your Rails database through a spreadsheet-like interface. Maintained by renuo on GitHub, where it has earned 124 stars from the community.

This gem intercepts and forwards email to a forwarding address in a non-production environment. Maintained by bigbinary on GitHub, where it has earned 105 stars from the community.