Photoshop is the Godzilla of graphics, so tools like LifeSniffer's Free Clone Stamp Tool follow the leader. It's also called the Rubber Stamp Tool, but it's the Clone Stamp Tool in Photoshop.
In graphics apps, the Clone Stamp Tool 'clones' (copies) a small area of an image and 'stamps' (pastes) it over another area, such as a blemish you want to hide.