Open source Routers firmware

Leading operating systems for Routers list:

1. DD-WRT
2. OpenWRT
3. Gargoyle
4. pfSense
5. Tomato

External links

1. List of router and firewall distributions
2. List of router firmware projects
3. Less then $25 dd-wrt routers at ebay
4. Google Trends comparison
5. DD-WRT / OpenWRT / Tomato comparison
6. AlternativeTo.net
7. 4 Great Alternative Firmwares to Install on Your Router
8. The Top 6 Alternative Firmwares for Your Router
9. Which is best for WiFi routers: Tomato, DD-WRT, OpenWRT, or something else?