Misc

Watching the temperature

You can use lm_sensors. Before running it for the first time, run sudo sensors-detect.

After that, type sensors to see your temperatures. If you want to monitor them for a longer time, type watch sensors.

Noise Cancelling

You can use EasyEffects or NoiseTorch. EasyEffects also has various other audio processing options, like crystalizer, noise gate, equalizer, filter, and much more. NoiseTorch can only cancel noise, but also has the option to tweak how aggressive it cancels noise.

Patching Audio

If you want to have a patchbay to route your audio to various destinations, Helvum might be what you're looking for.

Game Streaming

You can use sunshine to stream games from your computer to a client running moonlight

Downsampling

You can use Gamescope

Post Processing

You can use vkBasalt for additional rendering like anti aliasing or reshade (you might want to use reshade instead)

Bottles

Some people prefer Bottles to install games that don't have an install script in Lutris.

RGB

You can use OpenRGB.

Changing Mouse settings (DPI, lift of distance, etc)

Settings are usually stored in the mouse, so it is sufficient to boot Windows once, and change stuff there. You can also boot a VM (with KVM) and pass through the mouse. After that, the settings should be kept in Linux.