Calamari & Lies
Eclipse Phase official site
Exactly what it says on the tin. The forum and resources sections are particularly tasty.
Chuck’s Eclipse Phase Wiki
Most of the content of most of the books, all conveniently HTML-ified.
Rob Boyle’s Blog
The PDFs, free and legal from one of the creators. All hail the Creative Commons license.
Path of Totality
A fan site by Anders Sandberg, mostly to support his home campaign. He’s a futurist who has a PhD in Computational Neuroscience, so some of this stuff can get heavy. Don’t read the Adventures or Threats sections, everything else is fair game.
Also, to my players, I have a Dropbox folder set up with shared documents, all of you have invites, I can invite again if you need it. The same files are available on my local network if you’re at the house.
More to come!