Linear - Streamlined issue tracking for software teams
productboard - Beautiful and powerful product management.
BugHerd - BugHerd: The Website Feedback Tool for Agencies
Aha - Aha! is the new way to create visual product roadmaps. Web-based product management tools and roadmapping software for agile product managers.
Distiller - Distiller's hosted continuous integration platform takes the pain out of mobile development through automated build, test, and deployment of your iOS apps.
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.