Feedback Fish - Collect feedback & make your customers happy.
Tiny Marketing Wins - Get a (small) marketing tip every day
productboard - Beautiful and powerful product management.
Startup Marketing Playbook - The how-to guide for new B2B marketing leaders
Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.
The Growth Handbook - Tried & tested strategies for growing your business