Most interesting library you have seen lately

Question

What is the most interesting library you have seen lately?

In April i was watching a video online where the intel guys explained a little about Thread Building Blocks (which is also open source!) and i thought it was cool http://www.threadingbuildingblocks.org/

Answer 1

iBATIS, because I don't need an ORM but a query mapper to access complicated legacy databases.

Answer 2

Awesomium allow to embed Chrome in 3D apps.

http://princeofcode.com/awesomium.php

Answer 3

Apache PIVOT http://pivot.apache.org/ showed me that good UI is possible with JAVA :)