I really like LettuceMeet for that for our DnD group: https://lettucemeet.com/
5 karma · joined October 10, 2016
My goal was:
* to create a layout that has the extra layers useful for programming from Neo, but otherwise be standard qwertz as much as possible
* while being usable in combination with any layout (not just German), provided the keyboard has the right set of keys for the modifiers