TypeScript has been released under the Apache 2.0 license.
Those developers who have moved to Visual Studio 2012 have an advantage, since a plugin is already available: the TypeScript for Visual Studio 2012 plugin. It adds static error messages, code navigation and refactoring among other benefits.
About the Author
Keith Ward is the editor in chief of Virtualization & Cloud Review. Follow him on Twitter @VirtReviewKeith.