TaskBoard - A Kanban-inspired app for keeping track of things that need to get done.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

LeanKit by Planview - See how Planview LeanKit enables engineering teams across all levels of the organization with a visual work delivery tool to apply Lean management principles to their work, helping them work smarter and deliver faster.

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

My Personal Kanban - This is a one page HTML/JavaScript application for people who would like to use simple and basic...

Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.