Moved off from Trello to Restya, probably the best looking and working kanban out there. Restya(https://restya.com/board) is an excellent free Trello alternative, especially if you want to have Kanban and Gantt in a single solution. Here is the comparison between Restya and Trello https://restya.com/board/comparison. We are very happy with the services provided by the Restya team and would recommend them to all who want to buy their products or use their development services.