Sketch - Professional digital design for Mac.
Crowdin - Localize your product in a seamless way
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
OneSky - Full Stack Localization Solution