ProgressTalk - The best non-PSC owned Forums
Progress Community - You need this in your life if you have anything to do with Progress
ProTop - The best DB monitoring tool money can't buy
Database Advisor - A really useful tool for analysing your database structure and parameters for best practise
TheMadDBA - The previous link is on The Mad DBA's website which is alltogether a splendid resource for the performance tuners out there.
Session Trace - Combines the old profiler with DB CRUD stats for a holistic approach to application tuning.
Progress Openedge Documentation - The best place to start if you have a problem
JP Academic Services - My wife's transcription and proofreading business
Battrick - An online Cricket simulation game