Today, 10 years ago a few people started a new company based in Dortmund, Germany. It’s goal: Realize a pure software-based Voice over IP PBX running on Windows Server.
We called the company:

Astonishing that it’s already ten years.
And it’s still a lot of fun :-)
Update: I found a photo from that time. That’s Swyx in 1999:
I’m not sure of the exact date of the photo. It’s sometime in 1999.