I love collaborative projects, or projects based around group themes. Generally, objects produced as part of a collaboration or theme are specific to a particular site, and as such I can't offer those objects here. However, here is a listing of some of the files and projects I have collaborated on that are stored elsewhere:
The Harry Potter
A huge team effort to bring the magic of Harry Potter into the world of the sims.
Turn all your sims into Llamas, to celebrate the relaunch of... err... ModYourLlama2.com
A collaboration with the talented Real, available on MTS2
This site is not endorsed by or affiliated with Electronic Arts, or its licensors. Trademarks are the property of their respective owners. Game content and materials copyright Electronic Arts Inc. and its licensors. All Rights Reserved.