Quick Tip: Use gem.wtf to open a Ruby gem's repository

gem.wtf takes you straight to a Ruby gem’s source repository (usually a GitHub repo). Enter gem.wtf/<gem-name> in your browser’s address bar; for example, gem.wtf/rails.

It uses the gem’s RubyGems metadata, so it works with repositories outside GitHub too. If a gem does not declare a source repository, it falls back to its documentation or RubyGems page.

It’s handy for checking a gem’s README, issues, and history before using the gem or while debugging a problem.

It was created by Zeke Sikelianos; its source is available on GitHub.

Bonus tip: ghub.io does the same for npm packages.