Spritepacker

sp Command line tool and grunt task to generate sprite sheets.

Command line tool

Install with:

npm install -g spritepacker

Run with:

spritepacker my_file.png my_other_file.png

This will generate spritesheet.json and spritesheet.png in the current directory.

This is not created yet!

These apply to both the command line tool and (eventually) to the grunt task:

--out=<prefix>

Use this to specify the name and directory of the generated spritesheet, rather than the default spritesheet.json and spritesheet.png in the current directory.
--series=<size>

By default, the size of the generated spritesheet will be adjusted automatically to accommodate for all input files. If you use the --series option, then a series of spritesheets is generated instead. E.g., if you specify --series=512 then the generated images will be 512x512 pixels. They will be called spritesheet0.json, spritesheet0.png, spritesheet1.json, spritesheet1.png, and so on, and there will be as many images generated as required to accomodate for all input images.

There are things to do! Feel free to pitch in! :)