Any program to combine several images into one for use with CSS and to reduce round trip count?

Question

I'm looking at ways to reduce the quantity of Round Trips to my site for my clients. Right now I have several images that I think should be combined into a single image like this:

http://aspnetajax.componentart.com/common/themes/20101/Office2010Silver/Static.png

and then spit out some CSS like this:

http://aspnetajax.componentart.com/common/themes/20101/Office2010Silver/theme.css

... that way I can reduce the round trips and increase the speed in which my site is used (after the first load). Is there any simple tool that will do this for me? I figure it's 2010 and someone somewhere automated this. I have Visual Studio, and Expression Web and don't see it there

Answer 1

There's this online CSS Sprite Generator which should do what you're looking for. It will generate the image sprite from a zipped collection of single images, as well as the corresponding CSS rules to target and display each component image.

Answer 2

There's SpriteMe which is the online version of the 2010 tool you're looking for.