productboard - Beautiful and powerful product management.
SlimPlanner - Team scheduling, resource planning, task management
Product Roadmap Builder by ProdPad - Make gorgeous drag & drop visual roadmaps
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Roadmap - Collision avoidance for projects and people
WorkPatterns - The modern manager's toolkit: 1:1s, feedback, & recognition