OSQA is the open source Q&A system. It is more than just an FAQ page, it is a full-featured Q&A community. Users earn points and badges for useful participation, and everyone in the community wins. OSQA is built and maintained by a team of developers who share an interest in making a great, free, open source Q&A system available to everyone. The OSQA project is hosted and financially supported by DZone, Inc. Its features include
 <ul>
	<li>A question and answer engine that’s dead simple to use, has wiki-like features and a voting system</li>
	<li>A social networking engine that allows you to connect with and follow other people and topics and send private messages to each other</li>
	<li>A reputation system that lets you give and receive props for positive contributions to the community</li>
	<li>A powerful search function that helps you find relevant information quickly and easily</li>
	<li>The ability to create groups to help narrow content focus</li>
	<li>The ability to export site data</li>
	<li>The ability to easily federate content that’s created on your site (federating content = reusing content generated on one of your sites in another)</li>
	<li>The ability to import data from your current or old Stack Exchange site</li>
	<li>Support for widgets to expand functionality</li>
	<li>Automatic site activity reports</li>
	<li>The ability to customize your site using themes</li>
	<li>The ability to embed videos, audio and images</li>
</ul>

OSQA is the open source Q&A system. It is more than just an FAQ page, it is a full-featured Q&A community. Users earn points and badges for useful participation, and everyone in the community wins. OSQA is built and maintained by a team of developers who share an interest in making a great, free, open source Q&A system available to everyone. The OSQA project is hosted and financially supported by DZone, Inc.

OSQA - Stackoverflow like QA system in Python

Discourse is a platform for community discussion. Whenever you need a mailing list, a forum to discuss something, a chat room where you can type paragraphs, consider Discourse. It provides a flattened discussion, which avoids the pains of threaded forums, and delivers a more robust, intuitive interface to join a conversation at any point.


Discourse - Discussion Platform like Stackoverflow

Ephyra is a modular and extensible framework for open domain question answering (QA). The system retrieves accurate answers to natural language questions from the Web and other sources. The goal is to give researchers the opportunity to develop new QA techniques without worrying about the end-to-end system.

Ephyra - Question Answering System

LimeSurvey is an open source survey application. Each application could have unlimited surveys and each survey could have unlimited questions and participants. Almost 20 different question types are supported. Images and videos could be uploaded for a survey. It has better users and group management. The access to the survey could be restricted to group. It supports more than 50 languages for its front end and the survey could also be multi linugual. The survey could be imported and exported to different format including text, PDF, Excel. It allows users to quickly create intuitive, powerful, online question-and-answer surveys that can work for tens to thousands of participants without much effort. Demo link: <A HREF="http://www.limesurvey.org/en/demo" target="_blank">http://www.limesurvey.org/en/demo</A>
 <img src="/AppImages/Article/lime-img1.jpg" alt="" class="float-center">

LimeSurvey is an open source survey application. Each application could have unlimited surveys and each survey could have unlimited questions and participants. Almost 20 different question types are supported. Images and videos could be uploaded for a survey. It has better users and group management. The access to the survey could be restricted to group.

Limesurvey - Survey Application

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OSQA - Stackoverflow like QA system in Python

Discourse - Discussion Platform like Stackoverflow

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