Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
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.
Sketch - Professional digital design for Mac.
Frontify Style Guide - Create beautiful web-based brand manuals in minutes
Invision - Prototyping and collaboration for design teams
Brand.ai - Create a style guide & integrate with Sketch, Slack, & Gulp