Unison Embedded Operating System
The Unison Embedded Operating System offers 32 bit architectural support for System On a Chip (SOC) MCUs, digital signal controllers (DSCs), and digtal signal processors (DSPs) with an ultra tiny modular memory footprint. Unison RTOS is fully Linux and POSIX compatible.
wxEmbedded is a project to bring support for small devices and PDAs to the wxWindows library. wxWindows itself is a cross-platform GUI written in C++ with support for most major GUIs including Windows, GTK, Apple's OS X, IBM's OS/2, plain DOS and plain X11.
XScale PXA250 Embedded Linux Platform
based on the new Intel XScale PXA250 400 MHz CPU, the TRITON Development Kit includes 64 MB SDRAM, 32 MB Flash, 10/100 Ethernet, LCD controller with Touchscreen support, RS232, a Compact Flash drive and pre-installed Debian Linux. A break-out area is provided for you to add further interfaces.
The Yocto Project is an open source collaboration project that provides templates, tools and methods to help you create custom Linux-based systems for embedded products regardless of the hardware architecture.
Zeta is a virtual platform or architecture. It is implemented in a software emulator, and it was created for the sole purpose of having a new target to which the Linux kernel, GNU bintutils, and GNU gcc can be ported.