Stark - Contrast check and color blindness simulator for Sketch.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
President Flip Flops - Going back on your word, one step at a time
GIMP - GIMP is a multiplatform photo manipulation tool.
Catch - Catch is the easiest way to use ShowRSS on OS X. It'll take care of everything.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.