There have been and continue to be open source routers, but this is the first time I've seen one offered with a paid support program.
I have used some of the earlier "routers on a floppy", buth here and for commercial clients. I found them a really decent way to extend the useful life of an old PC and even a Pentium II at 233 MHz with only 64 megabytes of memory is capable of routing all the traffic in a fairly large office without breaking a sweat. I had one with exactly those specifications working in an office with 24 PCs and it ran like a champ for 3 years, until the hardware gave up.
As those had no firewall capabilities, I usually found it easier to actually install Linux and run that application alongside a software firewall. They were never an ideal solution, but they did serve.
Now, this company has a fully featured router app that will run on older hardware alongside today's fully featured firewall applications. You can download the software for yourself, though support costs money. It looks good.