I'm getting addicted to mouse gestures in a few GNOME (and alike) applications like Epiphany/Galeon, Firefox and Gaim.

Mouse gestures work usually the same in most applications and they are very useful especially in browser-mode navigational or tabbed-dialog user interfaces, that is, generally web browsers and instant messengers (but not spatial file managers). A quick list of most useful gestures in applications I mentioned:

 <----+            +---->    <------*   *------>     *
      |            |                                 |
      |            |                                 |
      *            *                                 +---->

Previous tab    Next tab        Back    Forward    Close tab

Just try to draw the shape using your middle mouse button anywhere in the application window. Depending on the way you installed these applications, you may or may not need to install additional plugins to activate mouse gestures. Gaim and Epiphany needs extensions, Galeon has them built in.

Enjoy,