Very brief feature list; by CNET/ZDNet Enterprise Business, Tech Update.

Microkernel OS used in realtime and embedded environments. Sun Microsystems open sourced it, with 4 licenses: Sun Public License Lite, GPL, Mozilla, FreeBSD. Description, download. [ExperimentalStuff.com]

Carrier-grade RTOS products and services for embedded markets, leverages Chorus, BSD, Linux, Eclipse, Java. Founded 2002 by original inventors of Chorus microkernel. [Open Source]

Brief, dense technical summary of Sun Microsystems ChorusOS.

Cornerstone for new embedded telecom platform; combines power of Solaris with realtime performance of ChorusOS.

Makes ChorusOS: highly scalable, reliable, POSIX compliant, embedded, realtime operating system; used by top telecom suppliers, in: public switches, PBXs, access networks, cross-connect switches, voice-mail systems, cellular base stations, cell-phones, web phones.