productboard - Beautiful and powerful product management.
Viable Fit - Measure and improve your product market fit
Aha - Aha! is the new way to create visual product roadmaps. Web-based product management tools and roadmapping software for agile product managers.
Product Fit - Measure product/market fit in app with your users.
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.
Product/Market Fit Survey - Check how close your product is to Product/Market fit