In no particular order. If it's free, it's a link to it. If not, you can be resourceful
UNFINISHED still. Also, this is targeted mainly at XP, since I don't use Vista/7.
Screen RecordingCamstudio (desktop etc, NOT games)
Fraps for game recording
CD Ripping, Music Conversion / ManagementCDex - CD ripping
dBPowerAMP Music Converter for converting between formats. Go to the codec central area for extra codecs
MP3 Tag Tools for managing ID3 tags
SUPER - More newbie video encoding/converting
MediaCoder - Advanced video converting (unfortunately somewhat spam-ware now)
CodecsCCCP Codec pack to get playing every video file out there up to speed
Quicktime Alternative and
Real Alternative - This and CCCP = perfect playback support in DirectShow
Media PlayingVLC and
Media Player Classic Home Cinema for playing videos.
Winamp 2.95 for music. [placeholder for plugin/skin pack]
Piratan/DownloadinguTorrent - torrents of course
Cabos - If you MUST use gnutella (network limewire uses) then use this client
Songr - Tool that queries mp3 search engines to find music you want, you will fall in love
System ManagementDefraggler - Don't use that piece of crap windows defragger, this is better.
QT Tab bar - Like firefox's tabs? Wish windows explorer did that? Then get this.
Bandwidth Meter - Keep track of your bandwidth usage
Taskbar Shuffle - drag and drop your taskbar items to rearrange them
TeraCopy - Replace the default file copy system with this. Tired of a 5,000 item copy stopping because of ONE problem with ONE file? Get this.
CCleaner - Tidy up crap that accumulates.
TweakUI - Customise many nuances, lots of other good tools on that page too
XP-Antispy - ignore the shitty name, it's got some nice tweaks and edits, it's similar to tweakUI above
System Management - InformationSpeedfan - Monitor temperatures and in some cases control fan speeds.
PC Wizard - The grand daddy of system info tools.
CPU-Z - CPU Info
GPU-Z - GPU Info
Editing, Reading, Opening, FormatsSumatra - PDF Reader
Audacity - Audio Editing
Notepad++ - Advanced text editing, syntax hilighting