Sketch - Professional digital design for Mac.
digiKam - Professional Photo Management with the Power of Open Source
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
JetPhoto Studio - JetPhoto Studio is a sleek and easy-to-use digital photo software that allows users to manage their photos in an attractive, intuitive mode and turning a sometimes frustrating chore into a fun and easy way by clicking only several steps.