Sprite Master Web export your CSS code. It even support CSS states like hover, visited, etc. You can view your CSS code on-the-fly.
Sprite Master Web supports MaxRects algorithm for aligning and ordering your sprite files in the best and minimum way.
Supports drag&drop from finder. If you drop CSS file it'll be parsed for images and imported into your spritesheet.
Sprite Master saves your spritesheet documents. Document files stores all the sprite files and sprite sheet parameters.
Exported CSS can be minified in different levels. Also, Exported PNG image can be optimized.
You can rename your sprites in the Sprite master. Thus, your export files will contains these names.