Mangagamer
JAST
DLsite

Wait wat

I'd like a GFWL integration, for some reason the official xbox one doesn't pick up GFWL games

Cubejoy (Chinese game platform from Taiwan) available here https://www.cubejoy.com/

Actually if I can get pointed on the steps to write the integration I may try and give it a go myself.

Plus another for Oculus.

And also a way to integrate mod managers, such as Vortex, as the only (current) way to play Skyrim VR with the mods I have installed is through that app.

Oculus +1
Viveport +1

- Gamersgate
- Zoom Platform

GamersGate

Add Big Fish Games to that.

Oculus +1
Viveport +1

+1 IndieGala integration, their current client is ugly,
Haven't got too many good games in there but its a constantly growing collection of freebies, would be nice to have listed in one place.

Playfire
No-longer updated or getting new games, but still works and would be nice to list and launch my 2 Splinter Cell games, without having to manually add them to GOG:

3D Realms Play
The no longer purchasable Special Release from 3G Realms that has all the classics in one download, manually adding each game is a bother :P

A bit off topic:
If if the community plugin search could be expanded to include the Amazon Games plugin,
instead of the old broken (last I checked) Twitch one, that would be nice for new galaxy installers.

Oculus + 1
Viveport +1