todotxt.net is an minimalist, keyboard-driven Windows GUI for your todo.txt file.
…spend less time managing your tasks and more time working on them - lifehacker
The UI is purposefully minimalist and can be completely controlled from via keyboard shortcuts. Most actions can be initiated with a single key, for example ‘n’ to start creating a new task, ‘u’ to update the selected task, or ‘x’ to mark a task as completed. It is fully compliant with Gina’s format spec, which means you can safely edit the file using the Android app or Linux/Mac todo.sh.
If you have found the app useful, please consider making a donation.
To get started, download the installer, then load your existing todo.txt or create a new one.
A notification will appear in the app's menu bar when a new version is released.
Help and Support
If neither of those routes are helpful, you can contact Ben directly.