Qwench is a PHP/mySQL based StackOverflow clone.

This is Askbot project - open source Q&A system - askbot-devel repository is open to anyone who wants to help develop Askbot - Askbot is based on code of CNPROG

 

A Q&A site helps your online community to share knowledge. No matter what your area of interest, people with questions can get super answers fast.

An open source Q&A(question and answer) eco-system

stackoverflow-like app written in ruby, mongomapper and mongodb Question Vote script.

Cahoots! is a community-building platform written in PHP, and designed for encouraging interaction and Q&A in a technically-oriented community.

 

 

 

 

Just like yahoo answers, users can ask unlimited questions and get answers from others. Best answers are selected by the question asker! Points are rewarded to users who answers questions!

 

 

Users can register into Inout QuerySpace and can post their questions or answers or comments. Inout QuerySpace is similar to popular sites like Yahoo Answers and Live QnA and allows a registered user to ask questionS...

Private Messenger, XML Feeds, phpMyFAQ is an open source FAQ system using PHP and available for many databases.

A professional and complete Q&A system with a lot of features. This company provides software that functions much like Yahoo Answers, Answerbag, Askville, etc. They give you a fully supported service and the script can be completely customized to...

This professional script was coded and designed to look and act just like the popular yahoo answers website.