Maven Plugin for the open-source tool smartsprites (https://github.com/carrotsearch/smartsprites/wiki/Documentation). It allows you the integration of the generation of spritesheets in your build process.
Restored smartsprites-maven-plugin. The original source code is no longer available on github and searching the net has come up empty handed. Therefore, this was restored from maven central and will serve as new home. If any more original code can be found, please submit it here.
See here for details regarding plugin from original authors.