All you need is PHP and a MySQL database. Installation can be done via file upload, git or docker.
Friendica is Free Software, licensed under the terms of the AGPLv3 (or later). The entire source code is hosted at git.friendi.ca. Join us by contributing to make this project even better. Don't be shy to be a contributor!
Decentralized architecture with no central authority or ownership. Relationships can be made across any compatible system, creating a network of Internet scale made up of smaller sites. Seamless wall-to-wall posts and remote comments, even across different network nodes.
Friendica has build in support for the OStatus (e.g. GNU social and Mastodon) and diaspora* (e.g. diaspora*, Hubzilla and Socialhome) protocol. With additional addons you can bridge to more networks like pump.io, Twitter and others.