SIMBL is the SIMple Bundle Loader.

It enables various plugins like PithHelmet to run in Cocoa applications such as Safari.

Bugs

If you think you've hit a bug, check the FAQ. If you're question hasn't been answered there, peruse the Issues List.

History

You can follow NewDevelopments for semi-interesting information about SIMBL. There are some enhancements scheduled for the near future. The brave can try and make sense of the change log.

Plugins

There are a number of SIMBL plugins to enhance a number of applications.

Development

For more information about developing plugins that use SIMBL, you can try following the tutorial. You could also skip to the troubleshooting section.