LiteOS - OS for sensor networks

LiteOS is an open source, interactive, UNIX-like operating system designed for wireless sensor networks. With the tools that come with LiteOS, you can operate one or more wireless sensor networks in a Unix-like manner, transferring data, installing programs, retrieving results, or configuring sensors. You can also develop programs for nodes, and wirelessly distribute such programs to sensor nodes.

The LiteOS 2.0 is the latest beta version of LiteOS. It runs on the following platforms: X86/Windows XP/Vista or Linux, MicaZ or IRIS as the target mote platform, and MIB510/MIB520 as programming boards.
Funding acknowledgement: The LiteOS Project is currently supported by NSF grant CNS-0953238 (2010-2015), and was supported by NSF grant CNS-0626342, and Vodafone Fellowship (2007-2009).
http://www.liteos.net/