Routers
Firmware
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.
Avoid
Mesh Networks
Notes

A mesh network is a decentralized peer-to-peer network, with user-controlled physical links that are usually wireless.

“Mesh networking (topology) is a type of networking where each node must not only capture and disseminate its own data, but also serve as a relay for other nodes, that is, it must collaborate to propagate the data in the network.”

Avoid