Mavenlink - Resource planning, time tracking, project financials, collaborative project management, and performance analytics all wrapped up in one intuitive solution.
SlimPlanner - Team scheduling, resource planning, task management
Hub Planner - Transparent Resource Scheduling, Timesheets, Vacation, Resource Requesting, Project Management & powerful Reports in an agile designed, feasible & intuitive software for simple planning
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.
Grenade HUB - Grenade HUB is the best team planner for agencies, studios and firms which are open to share their talents
WorkPatterns - The modern manager's toolkit: 1:1s, feedback, & recognition