Code.org
http://code.org/learn
http://studio.code.org/
Scratch
http://scratch.mit.edu/help/
https://scratch.mit.edu/explore/projects/games/
https://scratch.mit.edu/explore/?date=this_month
Gimp
http://www.gimp.org/
Paint.net
http://www.getpaint.net/index.html
LMMS
https://lmms.io/
Audacity
http://audacityteam.org/
Windows Movie Maker
http://windows.microsoft.com/en-us/windows-live/movie-maker
Soundbible.com
http://soundbible.com/
Pixbay
https://pixabay.com/