Faktory is a language-agnostic, persistent background job system.

Crystal is a programming language with the following goals:

Have a syntax similar to Ruby (but compatibility with it is not a goal)
Statically type-checked but without having to specify the type of variables or method arguments.
Be able to call C code by writing bindings to it in Crystal.
Have compile-time evaluation and generation of code, to avoid boilerplate code.
Compile to efficient native code.

Extendable version manager with support for Ruby, Node.js, Elixir, Erlang & more

Snyk helps you use open source and stay secure.
Continuously find & fix vulnerabilities in your dependencies.

Maily Herald is a Ruby on Rails engine that helps you send and manage your mailings.
Think of Maily as a self-hosted Mailchimp® you can easily integrate with your site.

Upton is a framework for easy web-scraping with a useful debug mode that doesn't hammer your target's servers. It does the repetitive parts of writing scrapers, so you only have to write the unique parts for each site.

Check easily whether a gem is ready for Rails 4 or not.

Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.