collecting open-source test-frameworks

as previously posted i'm busy writing my dissertation on "automated software testing for ajax-(Ext JS)-based web-applications".

i have the betas done for the parts introduction,motivation and basics of general testing of my dissertation.

now i'm searching for open-source testing-frameworks that fulfill my specific testing needs:
concept testing
change-based testing
functional testing
regression testing

i definitely have selenium with all its' modules on my plate and will try them till they break. i also read and heard a lot about Canoo WebTest and will give that a try as well.

any more tools?
hell yeah, there seem to be a lot of capture replay tools out there but well documented, open-source(!) tools that can handle ajax and ext JS on multiple browsers seem to be few and far between.

edit: opensourcetesting.org has a great list of open source testing tools. check them out!

- f -