This is a very nascent library at the moment.
Eventually I would like to write a good wrapper for gifsicle. For now, the only thing I personally need it for is resizing gifs. Feel free to submit pull requests however you like, or contact me for features or anything, or to talk about contributing.
You need to have gifsicle installed before you use this library.
var gifsicle_resize = require('gifsicle-resize')
gifsicle_resize.resize_gif_height("gif.gif", "output.gif", function() { console.log("File is done!")});