DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Piwigo.org - Manage your photo collection with Piwigo. Piwigo is open source photo gallery software for the web. Designed for organisations, teams and individuals.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Gravatar - Gravatar (an abbreviation for globally recognized avatar) is a service for providing...
Tiki Wiki CMS Groupware - Tiki Wiki CMS Groupware, also known as Tiki (or TikiWiki), is a full-featured, web-based, multilingual, all-in-one Free/Libre Open Source Software solution. Tiki can be used to create all kinds of web apps, portals, knowledge bases, intranets, etc.
novaGallery.org - Beautiful php image gallery - easy to use, with modern responsive design, private mode, themes, languages