WinDirStat Directory Statistics

WinDirStat - Directory Statistics is a small program that "shows where all your disk space has gone and helps you clean it up."

VLC Media Player

VLC Media Player - the cross-platform media player and streaming server. A good alternative to Microsoft's Media Player.

VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols. It can also be used as a server to stream in unicast or multicast in IPv4 or IPv6 on a high-bandwidth network.