Bynder - Bynder is a cloud-based digital asset management solution for marketing professionals looking to simplify how they manage digital content via one central portal.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Brand.ai - Create a style guide & integrate with Sketch, Slack, & Gulp
YouiDraw - Draw and Design Vector Graphics, Logo, Text, icon in the Cloud.
Frontify Style Guide - Create beautiful web-based brand manuals in minutes
Sketch - Professional digital design for Mac.