Impression provides a flexible way of adding custom watermarks to photos in Aperture while Aperture2Twitter enables the user to quickly send photos to Twitter.
SignalScope 2.0 includes full and partial upgrades, via in-app purchase, that unlock additional tools and functionality, which previously were only available in the Pro version.
Sequence is a simple way to capture and save an image or a movie of your screen to your computer's clipboard, or a file (in an image format of your choice).