Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
SocialEngine - Socialengine PHP: Elevating Your Online Community Experience.
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
JomSocial - Open Source Social Networking Software. Award winning open source community software by JomSocial. This social networking software is widely used by many Joomla users.
Mastodon - Mastodon is a decentralized, open source social network. This is just one part of the network, run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome!
phpFox - phpFox is a powerful social network platform for niche communities