Apologies to everyone involved for the "Choice paralysis" line. It was (I thought a bit more obviously), an exaggeration. To be clear: I myself rely on GiveWell, not to do identify the best charity for me, but to establish a lower bound on what "the most effective charity" might be, which I can compare to my best efforts at reviewing more-difficult-to-evaluate-but-probably-higher-impact charities (like, say, CFAR). And this is neither "choice paralysis" nor "not having any idea what to do." I'll change the OP to be less flippant.
I want to express my thanks to Eva for starting this project, and wish her luck and will getting more research done and the website updated with more content in the days/weeks/months to come.
AidGrade is a new charity evaluator that looks to be comparable to GiveWell. Their primary difference is that they *only* focus on how charities compare along particular measured outcomes (such as school attendance, birthrate, chance of opening a business, malaria), without making any effort to compare between types of charities. (This includes interesting results like "Conditional Cash Transfers and Deworming are better at improving attendance rates than scholarships")
GiveWell also does this, but designs their site to direct people towards their top charities. This is better for people with don't have the time to do the (fairly complex) work of comparing charities across domains, but AidGrade aims to be better for people that just want the raw data and the ability to form their own conclusions.
I haven't looked it enough to compare the quality of the two organizations' work, but I'm glad we finally have another organization, to encourage some competition and dialog about different approaches.
This is a fun page to play around with to get a feel for what they do:
http://www.aidgrade.org/compare-programs-by-outcome
And this is a blog post outlining their differences with GiveWell:
http://www.aidgrade.org/uncategorized/some-friendly-concerns-with-givewell