Chess related...
The Week In Chess - The absolute chess referenceChess World - Chess contest, games, software, PGN files and interesting links
Chess Any Time - To play chess!
Europe-Echecs - The chess reference for french speakers
Computer related...
Java Technology - The source for developersChess engines & chess programming info - Web site plainty of links!
Chess programming - Excellent series of essays on computer chess topics
MACChess - A site dedicated to chess on Mac
Mac related...
Spymac - The biggest Mac users community out thereMacBidouille - Bidouille hardware et software sur Mac
MacGeneration - L'essentiel du Mac en français
KidiFree - KidiFree est un programme permettant de découvrir une multitude de freewares