An intelligent time manager
VIR is an open-source intelligent time-management tool designed to tame the stress. By simply listing your tasks and schedules, VIR can automatically generate plans around your available time, and alert you of potential conflicts, so you’ll never have to worry about unrealistic deadlines or todo-list overload.
Windows, MacOS, and Linux are all supported. Download here.
See the project wiki. Check out the Basics guide for an introduction.