"Task Explorer is built using the Qt Framework, ensuring a cross-platform user interface with plans to eventually port the tool to Linux, which could make it one of the first advanced, GUI-based task managers for the platform."
Feels like the UI should be the least of your worry when wanting to port a task manager from Windows to Linux/macOS, but maybe I'm imagining it worse than it is.
"Task Explorer is built using the Qt Framework, ensuring a cross-platform user interface with plans to eventually port the tool to Linux, which could make it one of the first advanced, GUI-based task managers for the platform."