I'm looking for the best/easiet program to edit photos. I want to change the background, add text and maybe collage some photos together.
These examples:
http://www.cutoutandkeep.net/projects/diy-bras
I can't find other that I am thinking of, but the background is plain or pretty, not the normal background you have when taking a photo.
Also does anyone know if there is an app for iPhone that does it too?

Well the best photo editing programme I've used is Photoshop, but unless youre prepared to take part in some illegal activity it is rather expensive. Gimp is pretty good too and rather cheap.

I dont think you can change the background, but you can certainly add text and makes collages with photobuckets in- built program and its very easy to use.

theres some apps that add stickers and text but you need gimp or photoshop to fix the edges and cut out the shape of the item to put on the background unless you wanna print it do it by hand and scan it back on

picnik.com