Walbrix is an open-source operating system developed by STBBS.NET, LLC since 1976. It started as an 8-bit OS and now runs on PCs using various architectures like x86. Walbrix can be used for web servers, databases, and general purpose computing. It uses technologies like Linux, Apache, MySQL, and PHP and allows virtualization using Xen. STBBS provides support and services to help users deploy Walbrix in their IT infrastructure.