GURU FREELANCER MARKETPLACE PRO 2.0 works as a reverse auction platform and is very easy to use and customize.
Process is as follows
Service seekers / webmasters post their requirements / projects
Service providers / programmers/ designers place their bids
Both sort out any issues through project discussion board
Then service seeker chooses the service provider that they feel is best suited for their job.
Service providers complete the job and service seekers pay them
Then they place review for each other.
Info
http://www.guruscript.com/linux.php
Orignol Demo
http://gurufreelancerscript.com/demo/home.html
Working Demo
Fworkers.com
Download
http://www.mediafire.com/?fx833rbkmd464t8