ransack by activerecord-hackery

Transparently combine many reporting queries (on the same tables) into one fast query—even when queries have different groups or scopes. Maintained by midnightmonster on GitHub, where it has earned 131 stars from the community.

URL-friendly, base32-encoded UUIDs for Rails models. Maintained by pch on GitHub, where it has earned 85 stars from the community.

Sphinx/Manticore plugin for ActiveRecord/Rails. Maintained by pat on GitHub, where it has earned 1,620 stars from the community.