Asana - Task Mgmt. My Life Organized. Tudumo - Simple GTD Task Lists. HiTask: Task manager, to-do list, project management, team collaboration, online calendar, and task management software. Nozbe - getting things done gtd software task manager and to-do list for project mgnt. Gtdagenda.com. Voo2do - web-based to do lists. TaskFreak! web based task mgmt. Intranet, Group Calendar, Small Business Organizer: Backpack.