OpenWrt - OpenWrt is an open-source firmware based on Linux for wireless routers
OSRM - Utilities, Application Utilities, and Mapping APIs
MikroTik RouterOS - The main product of MikroTik is a Linux-based operating system known as MikroTik RouterOS.
OpenRouteService.org - The spatial services API with plenty of features.
pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
OPNsense - OPNsense® you next open source firewall. Free Download. High-end Security Made Easy™. Offers Intrusion Prevention, Captive Portal, Traffic Shaping and more.