A powerful, open-source social network kit written in PHP. It looks very modern and is designed for "social intranets" or private communities.
A central place where users see updates from friends or groups they follow.
Look for providers like 000webhost or InfinityFree . They offer free PHP and MySQL hosting, which is required to run WordPress or HumHub. Keep in mind these have lower "bandwidth" limits, so they are best for the building phase.
To build for free, you shouldn't code from scratch. Instead, use a or a dedicated social networking framework.
The logic that connects users together.