Platforms / Routers /
Firmware
Free Recommendations
OpenBSD
A secure BSD operating system.
OpenWrt
A GNU/Linux distribution for embedded devices.
Notes
libreCMC is an FSF-endorsed derivation of OpenWrt with the proprietary blobs removed. If your device is supported by libreCMC, definitely use it over OpenWrt.
Privatiu*
Routers
Firmware
Mesh Networks