http://walterfootball.com/ covers all aspects of the NFL (regular season, draft, fantasy, free agency, postseason) extensively and includes information on every team in the league. Opinion, not news.

http://www.rotoworld.com/ is a fantastic news source for real or fantasy football. It assembles rumors, news, and interesting tidbits from team official team websites, beat writers, and NFL reporters such as Adam Schefter.

http://www.profootballfocus.com/ has fascinating statistical analysis that can be found nowhere else. For the serious Eagle fan, a subscription is definitely worth it. The free parts of the site also provide plenty of information.

http://profootballtalk.nbcsports.com/ contains a great rumor mill. I compare it to rotoworld, although it cuts out under-the-radar developments while exploring more popular headlines in a more detailed fashion.

http://www.eaglescap.com/ is an excellent source for salary cap information. Their estimates for the Eagles' cap figures are usually dead on.