SocialEngine - Socialengine PHP: Elevating Your Online Community Experience.
CKEditor - Real-time collaborative future-ready rich text editor
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.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
phpFox - phpFox is a powerful social network platform for niche communities
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.