To Do Queues is a web-based app to manage to do lists in a simple, drag-and-drop interface.
Create your own custom categories (e.g. Home, Work, or a category for specific projects). Within each category, you can create custom queues that can be dragged-and-dropped into for organizing by priority (e.g. Low, Medium, High), stages (e.g. Concept, Implementation, Polish), etc.
I built the app for myself to manage my tasks in what I felt was a more intuitive user interface (and without all the clutter of other task managing apps), but decided to share it for others to use. Adjustments may come as needed!