Facebook similar code sites for free

There are many open-source platforms and frameworks that you can use to build a website similar to Facebook. Some popular options include:

1. Diaspora: An open-source, decentralized social network that allows users to own and control their own data.

2. BuddyPress: A plugin for the WordPress content management system that adds social networking features to a website.

3. Elgg: An open-source social networking platform that can be used to build a wide range of online communities.

4. NodeBB: A forum software powered by Node.js and MongoDB that allows you to add a discussion forum to your website.

5. Socialite: A Laravel package that makes it simple to authenticate with OAuth providers using Socialite Provider.

These are just a few examples, and there are many other options available. It is important to research and evaluate different platforms and frameworks to find the one that best meets your needs. It's also important to have a good understanding of web development and the technologies used before diving into such a project.