ELGG

The Open Source Social Network Platform

Elgg is an extendable Open Source Social Network Platform. Get you social network in minutes, totally in your control, extendable to support any feature, and with support by a wonderful, ever-growing community.
A great way to connect, share and collaborate. Ideal for businesses, schools, universities, groups and associations.

Gallery

Open Source Gallery Project

Gallery is an open source project with the goal to develop and support leading photo sharing web application solutions. With Gallery you can easily create and maintain albums of photos via an intuitive, web interface. Gallery works with several different image processing toolkits and is available in over 30 languages! You don’t need special privileges on your webserver to install, configure and maintain Gallery.

Piwigo

Open source web photo gallery

Piwigo was formally known as PhpWebGallery. Piwigo is a photo gallery software for the web that comes with powerful features to publish and manage your collection of pictures. It supports numerous galleries of all sizes all over the world, from an individual ten-photos party to the images stock of an agency. This scalability is supported by smart browsing capabilities based on categories, tags and chronological search. Various extensions make Piwigo even more scalable and customizable to suit your own needs and desires.

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Plogger

Plogger is the next generation in open-source photo gallery systems. A web application not bloated with superfluous features or complicated configuration settings. Plogger is a simple yet powerful tool — everything you need to share your images with the world. Plogger is your photos integrated into your website, a fully featured photo sharing package with an attractive and easy to use administrative interface that makes managing your galleries a breeze. Integrating our gallery software into your website is as easy as inserting three lines of PHP code.