Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Gramps - Research, organize and share your family tree with Gramps genealogy software.
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
Ancestry - Discover your family history and start your family tree.
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.
webtrees - webtrees - the web based Family History Software - is based on the popular PhpGedView ('PGV') application.