eCos
An open-source real-time operating system for embedded applications. Site includes news, documentation, downloads, FAQ, mailing lists and hardware compatibility details.
http://ecos.sourceware.org/
Code Confidence Ltd
Commercial provider of eCos IDE, tools and training services. Site includes technical notes.
http://www.codeconfidence.com/
How eCos can be Shrunk to Fit
By Jonathan Larmour, Embedded Systems Europe. Description of eCos configuration techniques to reduce system memory requirements.
http://i.cmpnet.com/embedded/europe/esemay05/esemay05p32.pdf
Open Embedded Technologies: eCos
eCos-related advice, techniques, project code and tool listings.
http://www.open-etech.com/RTOS/eCos
Wikipedia: eCos
Encyclopaedia article about the operating system, with links to many related topics.
http://en.wikipedia.org/wiki/ECos
eCosCentric Limited
Commercial provider of eCosPro derivative, porting, training and consultancy services.
http://www.ecoscentric.com/