VLC Media Player : a media player that can read the most common media formats.
Audacity : free audio editor that records, plays sounds, imports and exports WAV, AIFF, and MP3 files, and more.
NB to create MP3 files, you will have to download LAME MP3 Encoder Library from the same website. Audacity also records streaming audio.
XnView : a freeware to view and convert graphic files.
Gimp : Image manipulation program (freeware).
Macromédia Flash Player and Shockwave Player to open animated web pages.
J2SE Runtime Environment : Java environment.
Calibre Ebook Management : Ebook converter.
Adobe Acrobat Reader : to view and print Adobe PDF files.
PDF Creator : to create PDF files from nearly any application.
CCleaner : freeware system optimization and privacy tool.
Defraggler : for files and disk defragmentation.