Does someone know any user reputation engines? [closed]

Question

I develop website and would like to add reputation value to each user. So I'm looking for user reputation engine with features like:

• good reputation model
• users gain reputation when it do something what is liked by other users
• users with bigger reputation has bigger influence to other reputations
• exclude cyclic reputation exchange
• ...

Does someone know is there any implementions of such an engine? First of all I'm interested in python/django implementations but any other are interesting for me too.

Answer 1

I'm not familiar with a particular open-source product that works out of the box, but Randy Farmer has recently written an O'Reilly book on Building Online Communities that is quite helpful.

This SO topic may also help with building your own: Karma/reputation system