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steamtinkerlaunch
Discontinued Linux wrapper tool for use with the Steam client for custom launch options and 3rd party programs [Moved to: https://github.com/sonic2kk/steamtinkerlaunch] (by frostworx)
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You just start the game in Steam and get a dialog to launch the mod manager. And you can tweak tons of other stuff like run CheatEngine, ReShade, MangoHud. Check out the wiki for all features https://github.com/frostworx/steamtinkerlaunch/wiki
I do know someone who has successfully played VRChat using a quest 2 and ALVR https://github.com/alvr-org/ALVR through Linux.
If you mean on linux then Pulsemeeter is literally the linux version of voicemeeter that uses pulseaudio