There are many things out there, this is an on going list gimmie a link and I'll add it.
[url]
http://www.fitday.com[/url] - great site for logging food and activity, a pain to set up with your foods once you gt set though, a very nice tool.
http://www.abcbodybuilding.com - wondreful site, great resources, some info a bit dated and really only for people who wish to do body building for the rest of the world site is OK
http://www.dragondoor.com/articler/mode3/80/
http://freespace.virgin.net/jamie.k/russian.htm
http://www.engr.mun.ca/~butt/spreadsheets/peaking.html
Those last three are for people into body building or power lifting, those cycles are the best hands down ( IMO )
http://www.trifind.com for the people into endurance stuffs
lots more to come just not at my comp at the moment: