Sway - Sway is a drop-in replacement for the i3 window manager, but for Wayland instead of X11.
A5 - Takes notes in your browser. Elegant & simple.
Plum Village - Free mindfulness app w/ Zen Buddhist meditations + teachings
Falcon for iOS - Writing notes made simple
Calmind - Be smarter, less stressed, and healthier—just by listening!
Chars - Unicode Symbols Keyboard for iOS