Google Calendar smart-scheduler for tasks.
Twain is a To-Do list that integrates with Google Calendar to automatically schedule tasks in existing free time slots, helping you optimize your schedule. Add tasks to your To-Do list, including their due date and duration, and watch as Twain optimizes the tasks around your existing events! Includes support for setting "No-Schedule" hours, setting whether or not to schedule on the weekends, choosing which calendar to create events under, and selecting only certain calendars to take into account while scheduling. Also includes the option to Force Schedule a task on top of an existing event, giving you more control when needed. Easy Sign-On with Google, and worldwide timezone support included.