OpenWrt - OpenWrt is an open-source firmware based on Linux for wireless routers
eero - Blanket your home in fast, reliable WiFi
MikroTik RouterOS - The main product of MikroTik is a Linux-based operating system known as MikroTik RouterOS.
Plume - App for writing documents, scripts, books and more.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
MIWIFI by Xiaomi - Wifi router beta with a twist: you build it yourself