Invision - Prototyping and collaboration for design teams
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Plant - Version control app and plugin for Sketch
GIMP - GIMP is a multiplatform photo manipulation tool.
FOLIO - Simple version control app for designers based on Git
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.