Elgg

Elgg (open source SNS) is a free and open source social network system (php/mysql) that uses BLOG as the center to realize social networking. Once it came out, it received rave reviews, and some even compared it to the famous moodle. The Elgg (open source SNS) platform not only won the honor of the best social network open source CMS platform in 2007, but also received the highest praise from infoworld.

Screenshot of Elgg (open source SNS)