Preface
Elgg is a web application for social networking. It has all the features you would expect from a social web application. It has blogging, file sharing, social bookmarking, microblogging, activity streams, groups, "friending", user profiles, and the list goes on. However, Elgg is more than just a web application. It can also be used as a development framework for creating social websites. Developers are building impressive social media sites on top of the Elgg engine through its powerful API. They are using it to add social functionality to current websites and integrating it with other popular web applications.
Elgg is open source, licensed under the GNU General Public License (GPL). You can download, install, and use it without cost. Taking ...
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