Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
PixBuilder - Free Photo Editing Software for PC
Zeplin - Collaboration app for UI designers & frontend developers
showFoto - ShowFoto is the standalone image editor of the digiKam project.
ActiveWords - Auto correct on steroids
Fotografix - In addition to being totally portable, Fotografix has a ridiculously small footprint.