Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Shrink O'Matic - Shrink O'Matic is an AIR application to easily (batch) resize (shrink) images.
Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
yWriter - Free writing software designed by the author of the Hal Spacejock and Hal Junior series. yWriter6 helps you write a book by organising chapters, scenes, characters and locations in an easy-to-use interface.
ImageOptim - Faster web pages and apps.