Elgg开源SNS
Elgg是一款免费开源的社交网站程序(php/mysql)，以BLOG为中心实现社会网络的社会性网络构建平台。
elgg作为一个社会性网络构建平台，一经问世，即好评如潮，更有人将其与大名鼎鼎的moodle相提并论。这个平台不仅获得了2007年最佳社会性网络开源CMS平台的荣誉，在今年得到了info world的最高评价。
Elgg v1.8.3 changes:
Enhancements:
* Adds a white list for ajax views
* Improved navigation tab options
* Added group specific search
* Added button for reverting avatar
* Improved documentation for core class attributes
* Adds a server info page under administer -> statistics
* Improving caching of icons and js/css
* Deprecation notices not displayed to non-admin users
Bugfixes:
* Fixed upgrade scripts for blog posts and groups forum posts
* Can now delete invitations to invisible groups
* Fixed several widget bugs
* Fixed access level on add to group river item
* Fixed recursive entity enabling
* Fixed limit on pages in sidebar navigation
* Fixed deletion of large numbers of annotations
官网：http://elgg.org/
