Streaks - The to-do list that helps you form good habits.
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.
Gone - An ephemeral to-do list
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
The ToDon't List - A to-do list for avoiding the things you shouldn't be doing
XYplorer - File Manager for Windows