Was Cygnus eCos Sourceware page; Sourceware was Cygnus term for their free, open source software; then was Red Hat page. This was/is the page where open source aspects of eCos are arranged. Descriptions, documents, fora, downloads.

Growing article, with links to many related topics. Wikipedia.

Commercial provider, maintainer of eCos RTOS; no royalty or license fee, highly configurable (300+ parameters) for embedded systems, runs on most major processors; founded 2002; software, consulting, development, resources. [Open Source]

Tutorial to get OS up and running on new hardware; the first task when using any new OS. By Anthony J. Massa, Embedded.com.

By Anthony J. Massa; Prentice Hall, 2003, ISBN 0130354732, with CD. How to build low-cost, royalty-free embedded systems; covers architecture, installing, configuring, coding, debugging, bootstrapping, porting, other open source software components to...