# Open-Source Alternatives to Meetup > :information_source: Pull-requests are welcome! | Name | Source | Maturity¹ | 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 | | Calendar.social | [gitea](https://gitea.polonkai.eu/gergely/calendar-social) | inactive | Python | AGPLv3 | | Chapter by freeCodeCamp | [GitHub](https://github.com/freeCodeCamp/chapter) | new | JavaScript | BSD 3-Clause | | [Communecter](https://www.communecter.org/) | [GitHub](https://github.com/pixelhumain/communecter) | inactive | PHP | Apache 2.0 | | [eventoL](http://eventol.github.io/eventoL/) | [GitHub](https://github.com/eventoL/eventoL) | mature | Python | GPLv3 | | [Friendica](https://friendi.ca/) | [GitHub](https://github.com/friendica/friendica) | mature | PHP | AGPLv3 | | [Gancio](https://gancio.org/) | [Framagit](https://framagit.org/les/gancio) | new | JavaScript | AGPLv3 | | [Gath](https://gath.io/) | [GitHub](https://github.com/lowercasename/gathio) | new | JavaScript | 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 | Apache 2.0 | | [Hubzilla](https://zotlabs.org/page/hubzilla/hubzilla-project) | [Framagit](https://framagit.org/hubzilla/core) | mature | PHP | MIT | | [Human Connection](https://human-connection.social/) | [GitHub](https://github.com/Human-Connection/Human-Connection) | mature | JavaScript | MIT | | [joind.in](https://joind.in/) | [GitHub](https://github.com/joindin/joindin-web2) | mature | PHP | BSD 3-Clause | | [Meetdown](https://meetdown.org/) | [GitHub](https://github.com/structr/meetdown) | inactive | Structr | Apache 2.0 | | Meetup Alternative by Thinkmill | [GitHub](https://github.com/Thinkmill/meetup-alternative) | inactive | JavaScript | unlicensed | | [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 | BSD 3-Clause | | [OpenKi](https://openki.net/) | [Gitlab](https://gitlab.com/Openki/Openki/) | mature | MeteorJS | AGPLv3 | | [OSEM](https://osem.io/) | [GitHub](https://github.com/openSUSE/osem) | mature | Ruby | MIT | | [Pretix](https://pretix.eu/) | [Gitlab](https://github.com/pretix/pretix) | mature | Python | Apache 2.0 | | [Upcoming](https://upcoming.org/) | [GitHub](https://github.com/upcoming/upcoming-www) | mature | JavaScript | Apache 2.0 | ¹: _mature_ = the project is actively used by groups, _new_ = this is a new project with no usable software, _in development_ = usable software exists, but is not ready for general use, _inactive_ = was under development, but more than 1 year without commits ## See also