WPGear.org is a compendium of useful developer tools for working with WordPress.
WordPress-Gear is meant to be community driven, please feel free to jump in and add/remove any useful information via GitHub.
The easiest way to contribute is to have a GitHub account then click index.md, then click edit. This will automatically fork this project to your account so you can make changes, then submit a pull request. There are additional instruction if you want to clone this locally in the readme.
Please refrain from submitting any commercial products or themes. Links must allow for code browsing (github/bitbucket/svn..etc).
Core Unit tests
Command line fu
Plugins that help with debugging
Comparison of tools CompareWP Content Type / Custom Fields