Get App's icon from /Applications or App Store / Mac App Store

Take and upload screenshots to imgur.com

Google Image search based on image files on your computer

Control Flickr using Alfred Remote

Control Aperture on your Mac using Alfred Remote for iOS

Convert units, currency, length, weight, etc.

Takes a picture with your iSight, saves it to the desktop as "picture.jpg", and then previews it using Quick Look.

Memeflow gives you access to a preset list os memes.