The latest Win 10 Insider release has Bash implemented.

"In this build, you can natively run Bash in Windows as announced last week at Build 2016. To do this, you first need to turn on Developer Mode via Settings > Update & security > For developers. Then search for “Windows Features” and choose “Turn Windows features on or off” and enable Windows Subsystem for Linux (Beta). To get Bash installed, open Command Prompt and type “bash”. For more details, see this blog post."