Silc3r and Duet 2 Ethernet controller.
https://slic3r.org/
https://www.filastruder.com/collections/electronics/products/duet-ethernet
Well if you like Slic3r you should check the fork from it called SuperSlicer. Lot’s of very cool features.
https://github.com/supermerill/SuperSlicer/releases
Duet’s are good but I don’t like paying their HW prices so run other boards with Kipper, a Pi 4, and a front-end like Fluidd.
All my printers are custom built so having open source for everything is very important to me.