Scipy Documentation
Scipy has many great packages. Documentation lagged behind the code the code for a while but has been significantly improved recently. You should look at the scipy documentation page first. The link below might be of limited usefulness. This manual was created as a way to find modules that are not easily found with google or at the scipy website. It was created by a program that recursively ran pydoc to compile all of the doc strings and append index tags understood by Microsoft Word. Crossing over to the dark side and using Word created a pdf with a complete set of bookmarks and an index. The result is rough but it is a quick way to see what's there. It was created in July 2007.
Here is the link to the manual: Unofficial Scipy manual