Top 5 Open Source Q&A Systems

List of the open source Q&A implementation or stackoverflow-like website, with “Active” development and promising features and community.

• Website : http://www.osqa.net
• Demo : http://meta.osqa.net
• Language : Python, Django
• Database : MySQL, PostgreSQL or Microsoft SQL Server
• License : GNU General Public Licence (GPL)
• Source code : http://www.osqa.net/download/
• Created by : Folks at DZone

  2. Shapado

  
  • Website : http://shapado.com
  • Demo : http://shapado.com
  • Language : Ruby , MongoMapper
  • Database : MongoDB (Document Based DB engine)
  • License : GNU Affero General Public License (AGPL)
  • Source code : http://gitorious.org/shapado
  • Created by : David A. Cuadrado

    3. Askbot

    
    • Website : http://askbot.org
    • Demo : http://askbot.org
    • Language : Python, Django
    • Database : MySQL, PostgreSQL
    • License : GPL3
    • Source code : https://github.com/ASKBOT/askbot-devel/
    • Created by : Mike Chen and Sailing Cai

    4. Question2Answer

    
    • Website : http://www.question2answer.org
    • Demo : http://www.question2answer.org/qa/
    • Language : PHP
    • Database : MySQL
    • License : GNU General Public Licence (GPL)
    • Source code : http://www.question2answer.org/install.php
    • Created by : Gideon Greenspan

    5. LampCMS

    
    • Website : http://www.lampcms.com
    • Demo : http://support.lampcms.com
    • Language : PHP
    • Database : MongoDB
    • License : GNU LESSER GENERAL PUBLIC LICENSE (LGPL) version 3
    • Source code : https://github.com/snytkine/LampCMS
    • Created by : Dmitri Snytkine (Twitter)