any tools for compose many images to a PNG?

Question

i has a lot small images,like this

i want to compose them to a PNG file(for css sprite), like this

now,i using photoshop to do this,but i think should be has a tools for this.

compose images,better give to me every image's pixel position

it's possible? thanks for help :)

Answer 1

ImageMagick or one of its many bindings.

Answer 2

you mean something like this for css sprite?