Irwi is Ruby on Rails plugin which adds wiki functionality to your application.

A fast, safe, simple direct SQL executor for PG

Generated scopes for ActiveRecord classes.

Building APIs the way you want it.

Extends ActiveRecord::Store.store_accessor

Bit array for ActiveRecord

Amazon Redshift _makeshift_ adapter for ActiveRecord 5.

Enable ActiveRecord models to be handled as BiTemporal Data Model.

Adds various #where_assoc_* methods to ActiveRecord to make it easy to do correct conditions on the associations of the model being queried.

ActsAsBookable is a reservation engine for Rails applications that allows resources to be booked. You can define availability rules for bookable models and set costraints to implement different types of booking (hotels, theaters, meeting rooms...)

acts_as_favoritor is a Rubygem to allow any ActiveRecord model to associate any other model including the option for multiple relationships per association with scopes. You are able to differentiate followers, favorites, watchers, votes and whatever else you can imagine through a single relationship. This is accomplished by a double polymorphic relationship on the Favorite model. There is also built in support for blocking/un-blocking favorite records as well as caching.

Extends your user model with friendships management methods

Decreases the need to write integration tests by ensuring that the things you stub or mock actually exist.

Create, manage, and send scheduled email sequences and drip campaigns from your Rails app.

A utility that adds class based enum functionality to ActiveRecord attributes

With more than one application server, validates_uniqueness_of becomes a lie. Two app servers -> two requests -> two near-simultaneous uniqueness checks -> two processes that commit to the database independently, violating this faux constraint. You'll need a database-level constraint for cases like these. consistency_fail will find your missing unique indexes, so you can add them and stop ignoring the C in ACID.

Garner is a cache layer for Ruby and Rack applications, supporting model and instance binding and hierarchical invalidation.

Referencing code in app/ from a database migration risks breaking the migration when your app code changes; this gem prevents that mistake

Fragment cache for graphql-ruby

Adds group and membership functionality to Rails models