Difference between Jam's

From: joeymukherjee (lifeinagony_at_[hidden])
Date: 2005-04-13 22:27:46

Is there a webpage or something similiar which describes all the
differences between all the various Jams? I know of four. Perforce
Jam, FT Jam, Boost Jam v1 and v2? Are there others? Why so many? 
How to choose which one might meet my needs?

Thanks,
Joey