Free Software - GIMP

GIMP, meaning 'GNU Image Manipulation Program' is free digital imaging software that's a lot like Adobe Photoshop.


You can do all the basic stuff like image cropping, resizing, brighten/darken, changing exposure, saturate desaturate, adding text etc.


However, its the filters and the layering system that allows you to really go to town on your digital photos!

I've done a brief video tutorial on how to use layers in GIMP to replace backgrounds here.

Its free to download from the GIMP website