Here are some of the best BSD systems that you can try that can give Linux distros a run for their money. FreeBSD was notable in that it was available free of charge and the source code was included, traits that would spread Linux. The modern internet was largely developed on BSD systems, including TCP/IP standards. Yahoo also initially used FreeBSD on its servers back in the '90s. DragonFly BSDA more abstract way of thinkingIn what seems to be a theme in BSD development, DragonFly BSD is a fork of another BSD project.