I've just added my tweening library demo cart PICO-Tween to Itch! Hopefully it might be of interest to any of you who work with the PICO-8 or other fantasy consoles.
It operates as a PICO-8 optimised port of the Robert Penner easing functions, along with any math dependencies not included with the console.
You can view the page here: https://joebrogers.itch.io/pico-tween
And a link to the repository for the library here: https://github.com/JoebRogers/PICO-Tween