The Software Testing Automation Framework (STAF) is a framework designed to improve the level of reuse and automation in test cases and test environments. The goal of STAF is to provide a complete end-to-end automation solution for testers.
Metatest is an integration and load testing framework. It's designed to run different test engines, run tests in serial or parallel, retarget tests (e.g. test DEV, then test UAT), vary test load, support continuous integration, and more!