Netflix Party - Netflix Party is an extension for watching Netflix remotely with friends and family for movies nights with that long-distance special someone.
Piwigo.org - Manage your photo collection with Piwigo. Piwigo is open source photo gallery software for the web. Designed for organisations, teams and individuals.
Metastream - Watch streaming media with friends
novaGallery.org - Beautiful php image gallery - easy to use, with modern responsive design, private mode, themes, languages
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.
PhotoStructure - PhotoStructure is a complete photo and video management application designed for the whole family.