productboard - Beautiful and powerful product management.

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.

Aha - Aha! is the new way to create visual product roadmaps. Web-based product management tools and roadmapping software for agile product managers.

Brand.ai - Create a style guide & integrate with Sketch, Slack, & Gulp

ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.

Frontify Style Guide - Create beautiful web-based brand manuals in minutes