Image Capture for Mac OS X 10.6.6:
http://dl.dropbox.com/u/10644330/Image Capture.app.zip
If you have another version of Mac OS X please state it here. Or take a look at Pacifist to extract Image Capture from your Restore/Retail/Upgrade DVD.
Image Capture can be found in the Applications folder, what you think of, called Grab, is to make screenshots.