JetBrains MPS is a language development environment.
What is Early Access Program (EAP)?
We at JetBrains believe that making good tools for developers should greatly rely on developers' opinions. Our Early Access Program lets the development community closely participate in discussions devoted to JetBrains MPS and influence the planning and development from the early stages onwards. We hope this EAP will be both valuable and exciting, just as EAP program for IntelliJ IDEA is. We highly appreciate your feedback and ideas!
Warning
It is important to distinguish EAP from a pre-release software. Please note that the quality of EAP versions may at times be far below even usual beta standards.