I would also include sites like Adafruit.com and Sparkfun.com for prototyping supplies and the blogs they host. I know Octopart or the other Parts searches would cover these.
Another useful link would be to lists of electronics tools/instrumentation such as Oscilloscopes, Logic Analyzers, Spectrum Analyzers, plain vanilla Multimeters. EEVBlog has fantastic blog posts/equipment reviews and is already included in the list. This would help build your own little electronics workshop and would be useful to folks who are not formally trained in EE and want to self study and practice.
I especially loved the 'All About Circuits' tutorial site. I am too lazy to pore over my old Millman & Halkias or Horowitz and Hill text books. This gives me the information in bite-sized chunks.
Edit: I just noticed the 'contributing.md' link. Good work. "Don't come to me with problems, come to me with solutions." eh?