Spritesheet is described as 'CssSpriter is a small utility (with a nice graphical user interface) to create css sprite sheets from multiple icons (like icons, buttons, ...)' and is an app in the Development category. There are five alternatives to Spritesheet for Online / Web-based and Windows. The best alternative is Sprite Cow, which is free. Other great apps like Spritesheet are CSS Sprite Generator (Free, Open Source), SpritePad (Free), SpriteSheep (Freemium) and CSS Sprite Generator (Beta) (Free).
Optimized for speed: No download, no setup, no long-winded uploads. SpritePad works hassle-free directly in your browser, just drag & drop your images and you can immediately work with them to create your unique CSS sprites.
SpriteSheep lets you easily and visually generate CSS sprite sheets and CSS code with all sprites positions offline. CSS sprites technique helps to reduce HTTP requests and it's much easier to use CSS class instead of proving URL for each image.