A few: WinZip WinRAR WinAmp or some other MP3 playback proggy. A BitTorrent client (the official, ABC, Azureus...) A DC++ client + some other P2P software (Kazaa Lite Resurrection, Shareaza...) A messaging program (I use Trillian, but there are others too) mIRC A good firewall, like Tiny Personal Firewall, Zone Alarm etc. A good virus scanner (AVG Anti-Virus, AntiVir for Windows, Norton, Panda) A good ad/spyware remover (Ad-Aware, Spybot S&D) A good image editor (Paint Shop Pro or GIMP) An FTP client (FlashFXP etc.) A burner program (if you have a burner drive that is)...CloneCD or Alcohol 120% That's about it...Please add more.