PhotoCollage allows you to create photo collage posters.
Eye of MATE
This is the Eye of MATE, an image viewer program.
La'u Vali
MyPaint is a nimble, distraction-free, and easy tool for digital painters.
Pau
Krita is a FREE and open source painting tool designed for concept artists, illustrators, matte and texture artists, and the VFX industry.
Inkkape
Inkscape is an open-source vector graphics editor similar to Adobe Illustrator, Corel Draw, Freehand, or Xara X.
Vaai faalemafaufau
Imagine is a desktop app for compression of PNG and JPEG, with a modern and friendly UI.
Taofi Lima
HandBrake is an open-source video transcoder.
Gimp
GIMP is a cross-platform image editor.
Converseen
With Converseen you can convert, resize, rotate and flip an infinite number of images with a mouse click.
Cyan
The ciano is a multimedia converter for all the format you need.