Can anyone please suggest some good testing tools for a Django project?

I need to test the different use case scenarios, unit-testing, as well as load-testing for my project. Are there any good standard testing suites available?
Any other suggestion(s) for the testing process is greatly appreciated.

I use Django, postgresql on Ubuntu server if this information is necessary.

With the way that SharePoint sites are created in compare with regular way to create/code .Net, I always believe that there are many differences in testing between both types.I'd appreciate we share our knowledge & experience in this matter!

How do analyze the risk for the web application project?

How to do Manual/Functional/Load/Web tests for the web services developed using WCF technology