Watermark.ink - Online Photo Watermarker
Moom - Move your mouse over the green zoom button in any window, and Moom's mouse control overlay will appear (as seen in the above animation).
AG Audio Watermark Generator - AG Audio Watermark generator is a little app for both mac and pc that will help you to add an audio watermark to your original track in a fast & easy.
Hammerspoon - This is a tool for powerful automation of OS X.
ShortlyAI - An AI creative writing assistant, on your browser.
Spectacle App - Move and resize windows with ease.