wp-toolbelt by CoolPluginsTeam

#WordPressPlugin: Lets you make a WordPress page (or other content type) link to an external URL of your choosing, instead of its WordPress URL. Maintained by markjaquith on GitHub, where it has earned 115 stars from the community.

#WordPressPlugin: Site operators can create detailed, hierarchical documentation for the site's authors, editors, and contributors, viewable in the WordPress admin. Maintained by markjaquith on GitHub, where it has earned 107 stars from the community.

A WordPress plugin to change usernames. Maintained by dannyvankooten on GitHub, where it has earned 53 stars from the community.