- Swappy, a fast, customizable anagram generator in Elixir.
- Authority, a Ruby gem that "gives you a clean and easy way to say, in your Rails app, who is allowed to do what with your models".
- Searchlight, a Ruby gem that "helps you build searches from options via Ruby methods that you write".
- Caches, a small collection of Ruby caches with good performance and hash-like access patterns.
- Mendel, a Ruby gem to lazily build optimal combinations from lists.