Stack Overflow Stack Overflow, part of Stack Exchange , is a free, community-driven, reputation-based Q & A site for computer programmers. No... Free Web Android iPhone Q&A Knowledge base Add a feature 354 Like
Stack Exchange Stack Exchange is a fast-growing network of 84 [and counting] question and answer sites on diverse topics from software programming to cooking to photography and gaming.... Free Web Android iPhone Android Tablet iPad Q&A Add a feature 216 Like
OSQA OSQA is the free, open source Q&A system you've been waiting for. Your OSQA site is more than just an FAQ page, it is a full-featured Q&A community. Users... Free Open Source Web Self-Hosted Python Django Q&A Add a feature 11 Like
Scoold Scoold is inspired by StackOverflow and implements most of its features. You can ask and answer questions, upvote and downvote posts, earn badges and reputation. Each... Free Open Source Web Self-Hosted Knowledge base Q&A Add a feature 5 Like
AskBot Askbot is a Q&A system, like StackOverflow, Yahoo Answers and some others. Askbot is based on code of CNPROG, originally created by Mike Chen and Sailing Cai and... Freemium Web Self-Hosted Python Django Q&A Add a feature 11 Like
Solace Solace is a fully open-sourced multilingual support and knowledge exchange platform written in Python. Free Open Source Mac OS X Windows Linux Web Knowledge base Q&A Add a feature 5 Like Discontinued Latest commit on Nov 29, 2009, see https://github.com/Plurk/Solace
Coordino Coordino allows you to create a question and answer system for you and your users to enjoy. Whether you are looking to create a niche question and answer site for... Free Open Source Linux Web Self-Hosted Q&A Add a feature 4 Like
Shapado Shapado is a questions and answers site for your enterprise or community, your “knowledge base on the cloud”. It makes sure questions never get asked twice by making the... Freemium Linux Web Knowledge base Add a feature 7 Like
AnswerCart AnswerCart provide a community platform to the businesses which can be integrated with websites or mobile apps. Using community, users can engage in Q&A, blogging... Commercial Web Customizable Q&A Add a feature 1 Like
Glisser Glisser makes presentations interactive, by combining them with live audience Q&A and polls. Freemium Mac OS X Windows Web Clear interface Customizable Q&A Add a feature 6 Like
Answers Answers is the place to go to ask questions and receive answers from the community at large on any topic. Connect with people who know the answers to your questions... Free iPhone Community based Q&A Add a feature 2 Like
Askalot Askalot is a next generation CQA (Community Question and Answer) system. Free Open Source Self-Hosted Q&A Add a feature 1 Like
Fixoncloud Interaction platform for programming enthusiasts, learners, and experts to solve problems. Fast and inexpensive solutions to your programming problems. People with no... Free Windows Q&A Add a feature 1 Like
Eris Solver Free crowdsolver for complex problems. Using the problem tree analysis and an interdisciplinary approach. Free Web No features added Add a feature 0 Like
YES NO Hypersay Hypersay is a platform for interactive presentations that massively increase engagement. Keep your audience engaged with polls... anonymity audience-engaged audience-qanda-wall claps embed-videos
