MavensMate wraps and extends the super-powerful Salesforce.com Partner, Metadata, and Tooling APIs to provide a rich experience for developers. It's written FOR Force.com developers BY Force.com developers.
MavensMate provides rich UIs for common operations like creating new projects, editing projects, running Apex unit tests, deploying to servers, etc.
MavensMate for Sublime Text is now available for Windows and Linux users too!
MavensMate plugins for Sublime Text 2 and 3 are available now. Take advantage of Sublime Text features like code assist, quick find, etc. when building your Force.com applications.