Is there any open source software can provide the similar features of Yahoo Answers?

not software but google has something simmilar to yahoo answers

no software can do this.
Only online share is avaliable, many many sites like yahoo answers do this kind of service.
such as:
http://www.blurtit.com/
http://www.answers.com/ this one is famous.
or http://www.asktheanswer.com/

but i like the yahoo answers better?
you can try others as well!