Operating Systems

• FreeBSD, with picobsd, a version that fits on a floppy
• Freedows
• Linux
• NetBSD
• OpenBSD
• QNX real-time OS, for Intel processors
• RTEMS: Real-Time Executive for Multiprocessor Systems, a free RTOS (Motorola, Intel, PowerPC, Sparc, ...)
• Real-Time Micro Kernel
• Java Operating System: The JOS Project(tm) is a collaborative undertaking by an international group of programmers and enthusiasts aimed at the creation of a free and open Java based operating system. Based on RTEMS real-time executive kernel.
• combines the development of public software with the teaching of Computer Science; wants to develop Java-based tools (nothing so far)