Matic Network is a scaling solution for public blockchains. Based on an adapted implementation of Plasma framework (Plasma MoreVP) - with an account based implementation (read more here), Matic supports all the existing Ethereum tooling along with faster and cheaper transactions.
The latest developer resources will be updated here on a continuous basis.
If you are new to blockchain, Core Concepts is a good place to start. For an introduction and technical overview of what is Matic Network, head over to Matic Overview. For guided walkthroughs refer the Tutorials section.