This page is always changing and, hopefully, expanding...
Jobs...
Technical Writing Jobs: http://www.technicalwriter.computerjobs.com/
I don't think she sleeps: http://www.writersrow.com/
Magazine listings: http://www.woodenhorsepub.com
Markets: http://www.writersmarket.com/index_ns.asp
Weekly lists: http://www.aboutfreelancewriting.com/
Contests...
Annual short fiction competition: http://www.inkwelljournal.org/
Tons of contests throughout the year: http://www.writersdigest.com
Communities...
A wealth of information: http://www.worldwidefreelance.com/
Simply the best: http://www.writersweekly.com
Tools...
Best website for writers: http://www.fundsforwriters.com
Write better: http://www.lousywriter.com/
A great writer's calendar: http://www.bylinescalendar.com/
Great advice and tips: http://www.writingontherun.com
White Papers: http://www.writingwhitepapers.com