Given the fact that TypeScript is Open Source, is this Web-Based IDE also available as a tool that can be downloaded anywhere?

I'm developing a web application in which the client can write a user-defined expression (with user-defined variables and predefined methods) which is evaluated, compiled and used at runtime on the server using C# .Net. Using TypeScript and its wonderful web-based editor's features like syntax or error highlighting, code completion, method signature suggestion, etc, saves me lots of trouble in the user interface.

So is this editor also part of TypeScript? If not, is there any other open source solutions with similar capabilities?