OSS/Libre alternatives I use every day (or occasionally)

After working in IT for over 10 years and 5 as an embedded dev I've managed to find out some OSS/Libre alternatives to common tools devs and sysadmins and others use every day. So I compiled a WIP list below:

Product Alternative Info
VMWare Proxmox*
MailChimp listmonk* Runs on everything, even NetBSD
VSCode VSCodium No more AI and telemetry
Router firmware OPNsense / OpenWRT OpenWRT is best if you have WIFI
Bambu Slicer Orca Slicer Because bambulab sucks
SynologyNAS TrueNAS SCALE*
Any streaming service/Plex Jellyfin*
GitHub Forgejo* Used by Codeberg
LastPass BitWarden*
DaVinci Resolve Kdenlive
Fusion360 FreeCAD/OpenSCAD
Hardware debugging BlackMagic Debugger Works great with blue pill/black pill
Altium Designer KiCad
C/C++ DevTools (VSCode extension) clangd and CodeLLDB C/C++ DevTools cannot run on VSCodium
Copilot for VSCode Continue Good if you have local LLMs
Discord/Teams Matrix*
Matlab GNU Octave
Saleae Logic 2 sigrok pulseview I still use Logic 2 at work since the GUI is wonderful, and Saleae is a pretty nice company

* available as self hosted services