This is a Sublime Text package which provides syntax highlighting for the Jack language used in Nand2Tetris projects and the book The Elements of Computing Systems.
If you have Package Control package installed, you can install Jack from inside Sublime Text itself. Open the Command Palette and select "Package Control: Install Package", then search for Jack.
If you want to edit/improve the Jack package, this is how you should install it—otherwise, Package Control may overwrite your changes.
Clone this repository into your packages folder:
git clone git://github.com/swarn/sublime-jack.git 'Jack'
Currently, the package only implements basic syntax highlighting for Jack. Pull requests are welcome!