The Best Maths Websites: PlanetMath.org Reviews

[gel]

Does anyone have any opinion on the best maths websites availiable?
I was thinking of something which gives an extensive coverage of all the main subject areas, provides detailed proofs, and is open to user contributions. http://planetmath.org/" seems to be the best place. Do people here use this, and are there alternatives around?

 

[morphism]

PlanetMath is probably the best of the lot. There's Wikipedia too, but I personally am not a fan of it.