Free Resources for Mathematics

A collection of free and publicly available mathematics resources (textbooks and lecture materials, etc). Of course, they are all legally available!

Links

• Mathematics Stack Exchange A site where you can ask and answer questions on mathematics.
• Wolfram Alpha Ultra-high-tech calculator that understands natural language .
• MIT OCW MIT Open Courseware．
• Free Computer Books A site with a collection of free books on programming and mathematics. Among similar sites, this site has fewer illegal ones.
• American Institute of Mathematics/Approved Textbooks Collection of books made open access by the American Institute of Mathematics.