SaMotion (version: 1.11 Build 325) is a minimalist and portable task manager or more simply a to do list. Just download and extract the exe, then double click it.
The program offers a dark or light theme and nothing else except categories and tasks indented. Hovering shows the + icon to add either a category or task, only one level deep. Clicking on an existing category or task makes its title or text editable. The other program settings are docking to the left or right and staying on top. The .sm file extension can be associated with the program as this is the format the lists are saved in. A task can be color coded to any one of green, orange or red colors by clicking immediately to the left of an item.
Lists or projects as they are called are encrypted (Blowfish 448Bit) and the list can be exported to a password protected PDF.
The program could use enhancements that still keep it minimalist. Two such features or improvements could be support for dates and better handling of longer text. In the screenshot above the longer item just disappears without any indication.
SaMotion runs on Windows 7 and newer.