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.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
Welti - Build high-performing teams without workload fatigue
Microsoft Planner - Microsoft Planner lets you easily bring together teams, tasks, documents, and conversations for better results.
Ripley - The project management tool for G Suite
Metana - Task migration tool written in Go for Golang services