Open Source Software samples
Just a few samples of open source software...
Libreoffice A powerful office suite.
Picasa or Shotwell to organise or share photographs.
Scratch was mentioned on the first page.
Gimp A very powerful image manipulation application.
Gramps Powerful genealogy application.
Blender 3D film animation as used to make the Big Buck Bunny film.
or watch the demo below.
The list just goes on and on.
More to be added...