Do you feel like living dangerously? Take the fabled and famous BeOS, marry some of the pieces to an open source project, give it a new name, and Haiku is born.
Haiku is a new open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.
Haiku runs on most Intel PCs, recent Pentium models and up. No applications, no 64-bit version, but the price of intriguing agony is free.