Links
Mapping / Modding
twhl Half life Tutorials, interlopers more Half Life Tutorials, Tack's Deus-Ex Lab Deus Ex Tutorials
PC Hardware
Dabs Large online retailer I often use, Ebuyer Another online retailer I use, Overclockers This one is more geared towards gamers and high end equipment also has a great Forum, Overclock More gamer equipment.
Genreal Gaming
MTB
Merlin Cycles Got some great deals from here keep an eye on 'the this week's offers' Chain Reaction Cycles Another Large online cycle retailer
Misc
google I think we all know, Smart FTP free ftp Software, GIMP GNU Image Manipulation Program like Photoshop, but unlike Photoshop its free