Download The Gimp
and you'll know what this is all about.
- Photoshop-ish Keyboard Shortcuts for The Gimp
- Rounded Selection plugin
This Script-Fu plug-in rounds the corners of a selection. If no selection exists, a selection is made of the entire layer size and the corners are rounded.
Download and copy the Rounded Selection script to the
C:\Documents and Settings\<user name>\.gimp-2.2/scripts
Upon restarting the Gimp, you will have a new menu option named Rounded Selection under the Select menu entry as referenced in the screenshot below.