Swatches - A fun and accurate color picker for the real world
Ralpha Image Resizer - High-speed image batch conversion tool
ColorSnapper - The missing color picker for Mac.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Colordot for iOS - A color picker for humans.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.