Comega: Cω
C# extension, in two areas: Control flow extension for asynchronous wide area concurrency (was Polyphonic C#); Data type extension for XML and table manipulation (was Xen and X#). [Microsoft Research]
http://research.microsoft.com/comega/

VideoCapture
A Win32 Python Extension for Accessing Video Devices (e.g. a USB WebCam, a TV-Card, ...) [Open-Source, LGPL]
http://videocapture.sourceforge.net/

Pyrite
Extension package for the Python programming language which allows access to Palm Computing platform devices and their data.
http://www.pyrite.org/

eQip: Embedded QNX on Intelligent Platforms
eQip: Embedded QNX on Intelligent Platforms ( iPAQ/Pocket/Personal Devices )
http://eqip.openqnx.com

Feedalot Reader
Free web-based RSS news reader, that supports Blackberry, Palm, Pocket PC and mobile devices. Also has Firefox extension.
http://www.feedalot.com/

University of Nebraska Panhandle Research and Extension Center
Agricultural research and extension facility in Scottsbluff serving the needs of Western Nebraska. Information about staff, research, crops, and extension offices.
http://www.panhandle.unl.edu/

IMAP Sort Extension
Working draft extension to the IMAP4 (RFC2060) standard
ftp://ftp.ietf.org/internet-drafts/draft-crispin-imap-sort-00.txt

NCSU Agricultural and Extension Education
The Department of Agricultural and Extension Education at North Carolina State University offers degree programs at both the undergraduate and graduate levels. The Bachelor of Science degree is offered with three options: teaching, extension, and communications. At the graduate level, students may select either a Master of Science Degree (with a thesis requirement) or the Master of Agricultural and Extension Education Degree, which is a non-thesis degree. Graduate students may also apply for admission to Doctor of Education (Ed.D) programs with an emphasis in agricultural or extension education in the College of Education and Psychology.
http://www.cals.ncsu.edu/agexed/

Tcl SourceForge Project
A portable extension that provides the power of OpenSSL to Tcl programs. This extension can be used to utilize SSL encryption on top of any valid Tcl Channel - not just sockets!
http://tls.sourceforge.net/

University of Minnesota Extension Service
Features access to Extension publications, newsletters, audio scripts, news releases and programs.
http://www.extension.umn.edu/