Please post any of your favourites (preferably free

) conference management apps. Basically web based apps that implement workflows for paper submission, review, debate, etc.
I recently came across EasyChair (
http://www.easychair.org/) which looks positively cool! Never knew I had already been using this without realizing, for several years now and even had a login there.
There also used to be an app called ConfMan (can't find it now though), which was pretty comprehensive. And yes, there is Microsoft's CMT; but I've found it extremely hard to use sometimes.