There is quite a lot of them - here is a list of few I've been working with:

One of the most common is probably glm http://glm.g-truc.net/

Another good one is Eigen (Probably most generic out of these) http://eigen.tuxfamily.org/index.php?title=Main_Page

Then there is Sony's vectormath (used in Bullet engine) http://bullet.svn.sourceforge.net/viewvc/bullet/trunk/Extras/vectormathlibrary/include/vectormath/

You might also look into http://sourceforge.net/projects/simdx86/ although it's under LGPL license.

Another open sourced (fully written in sse2 intrinsics) - https://github.com/LiraNuna/glsl-sse2/tree/master/source

Great reference

Thank you