marketee spilled the following:
You should get out more or learn to research properly.
(Yeah, I know it's just a spam).
Just in case anyone is looking for groupware....Sourceforge lists several
hundred projects which might fall into this category.
http://www.phpkitchen.com/pollbooth.php?qid=bestGroupWare&aid=-1 has some
discussion on some of the better PHP ones.