Pretty low-latency (~200ms on my WiFi), decent quality, simple setup (once everything is compiled if not on Arch), really nice toolset!

Runs through pipewire, pulseaudio, alsa, take your pick.

Amazing pandoc template for letters that will follow the German regulations (DIN 5008). Write it with markdown, compile with pandoc and latex, be happy.

Similar letter template but less German here: https://github.com/aaronwolen/pandoc-letter/tree/master

A wide array of e-mail obfuscation techniques checked for their efficacy, and explained nicely.
Sorted by plain-text/hidden and js/non-js techniques.
Combine one or two and you should be relatively golden.

One of, perhaps the best single source of tutorials (a meta-list if you want) for bash scripting.