In an old comment Steve Rayhawk cited the University of Michigan Chemical Engineering Process Dynamics and Controls Open Textbook. It's really nice, in that the writing is both brief and dense.
I'm sure most people here are familiar with http://www.scholarpedia.org , a well curated encyclopedia of scientific topics.
I recently came across http://examine.com/ which is a combination of encyclopedia and meta-analysis for supplements and cognitive enhancers. Given the popularity of the "Practical" section on http://www.gwern.net/ I think most of us would be interested in this information, and it's incredibly readable and well presented.
Can anyone suggest websites of similar quality? To be specific, I'm talking about
1) many searchable topics collected in one place
2) Well cited and in-depth reviews of literature and/or thorough meta-analyses
3) Adequate quality control. For example, all examine.com edits must pass two-man review team and Scholarpedia does decentralized peer review.
Topic or focus is not important, as long as there is a wealth of dense, high quality, **well cited** information. Suggestions?