SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
SANeForce - SAN Pharma Sales Force Automation
Gnome To Do - GNOME To Do is a simplistic personal task manager designed to perfectly fit the GNOME desktop.
ReIcon - ReIcon is portable freeware that enables you to save and restore your desktop layout.
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.