Sxmo: Simple X Mobile
Sxmo, or Simple X Mobile, is a collection of simple and suckless X programs and scripts used together to create a fully functional mobile UI adhering to the Unix philosophy for the Pinephone. You control the UI largely through using the Pinephone buttons (press different numbers of times quickly for different actions) and swipe gestures.
This software project is an initiative by Miles Alan. I contributed in certain areas and am currently a co-maintainer of this project.
Check out the demo video I made to get an impression of this software.