# Open-Source Alternatives to Meetup > :information_source: Pull-requests are welcome! | Name | Source | Maturity | Backend Language | License | |------|--------|----------|----------|---------| | [Agorakit](https://agorakit.org/) | [GitHub](https://github.com/philippejadin/agorakit) | mature | PHP | GPLv3 | | [attendize](https://www.attendize.com/) | [GitHub](https://github.com/Attendize/Attendize) | mature | PHP | Attribution Assurance License | | Chapter by freeCodeCamp | [GitHub](https://github.com/freeCodeCamp/chapter) | new | JavaScript | BSD 3-Clause | | [eventoL](http://eventol.github.io/eventoL/) | [GitHub](https://github.com/eventoL/eventoL) | mature | Python | GPLv3 | | [GetTogether](https://gettogether.community/) | [GitHub](https://github.com/GetTogetherComm/GetTogether) | mature | Python | BSD 2-Clause | | [Gospeak](https://www.gospeak.fr/) | [GitHub](https://github.com/loicknuchel/gospeak) | mature | Scala | Apacke 2.0 | | [joind.in](https://joind.in/) | [GitHub](https://github.com/joindin/joindin-web2) | mature | PHP | BSD 3-Clause | | [Mobilizon](https://joinmobilizon.org/en/) | [framagit.org](https://framagit.org/framasoft/mobilizon/) | in development | Elixir | AGPL | | [on_ruby](https://www.onruby.eu/) | [GitHub](https://github.com/phoet/on_ruby) | mature | Ruby | (extended) Beer-ware | | Open Event | GitHub: [Frontend](https://github.com/fossasia/open-event-frontend), [Backend](https://github.com/fossasia/open-event-server) | mature | Python | Apache 2.0 & GPLv3 | | [Open Tech Calendar](https://opentechcalendar.co.uk/) | [GitLab](https://gitlab.com/opentechcalendar) | mature | PHP, HTML JS | 3-clause BSD | ## See also