AUDIO-VIDEO-MEDIA

AUDACITY (Windows, Mac, Linux)
A superb audio recording and editing app . I use it for all my audio recording and processing - don't waste your money on commercial products.

PICASA
This site contains a link to the successor Google Photos.

GIMP (Gnu Image Manipulation Program) (Windows Link).
Comparable with Photoshop in sophistication.

VLC MEDIA PLAYER   (Windows, Linux)
Best of the bunch.