If you are developing Rails applications using TextMate you should not be without TextMate Footnotes.

This plugin saves you time when moving between your browser and Textmate. It adds clickable links to the Rails backtrace when an error occurs, and clickable "footnotes" to the bottom of each page (in development mode only). These links open the correct file in Textmate and move your cursor to the precise line of interest.

In addition, you will have session, params and cookies information available to you in development mode on all rhtml rendered pages.

It's simple to add to your project: go to the command line and navigate to vendor/plugins and issue the following svn command.

svn propset svn:externals "footnotes http://macromates.com/svn/Bundles/trunk/Bundles/Rails.tmbundle/Support/plugins/footnotes" .