- [Simple Machines Forum](https://www.simplemachines.org/) - Free, professional grade software package that allows you to set up your own online community within minutes. ([Source Code](https://github.com/SimpleMachines/SMF2.1)) `BSD-3-Clause``PHP`
- [Socialhome](https://socialhome.network) - Federated and decentralized profile builder and social network engine. ([Demo](https://socialhome.network/), [Source Code](https://github.com/jaywink/socialhome)) `AGPL-3.0``Python`
- [Talkyard](https://www.talkyard.io/) - Create a community, where your users can suggest ideas and get questions answered. And have friendly open-ended discussions and chat (Slack/StackOverflow/Discourse/Reddit/Disqus hybrid). ([Demo](https://www.talkyard.io/forum/latest), [Source Code](https://github.com/debiki/talkyard)) `AGPL-3.0``Scala`
- [Teddit](https://teddit.net) `⚠` - Alternative Reddit front-end focused on privacy. [Source Code](https://codeberg.org/teddit/teddit) `AGPL-3.0``Nodejs`
- [Teddit](https://teddit.net) `⚠` - Alternative Reddit front-end focused on privacy. ([Source Code](https://codeberg.org/teddit/teddit)) `AGPL-3.0``Nodejs`