LinuxDevices - NASA rev's open-source OS abstraction layer:
"NASA has released version 2.0 of a software library meant to allow real-time applications to be compiled on multiple real-time and desktop OSes. Operating System Abstraction Layer (OSAL) provides generic interfaces for real-time services, filesystems, port I/O, and memory interfaces, and supports Linux, Windows/Cygwin, VxWorks, RTEMS, and Mac OS X."
