XMPP is a set of open XML technologies for presence and real-time communication, extended through the standards process of the XSF.
hedgemage groups
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xmpp
XMPP and the XSF
http://xmpp.org/
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linux
Linux
http://en.wikipedia.org/wiki/Linux
Linux [or more correctly GNU/Linux] is a generic term referring to Unix-like computer operating systems based on the Linux kernel.
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drupal
Drupal
http://drupal.org/
Drupal is an powerful, versatile and feature rich open source content management platform.
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edubuntu
Edubuntu
http://edubuntu.org
Edubuntu is the education-focused wing of the Ubuntu community. Learn more at http://edubuntu.org
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geocaching
Geocaching
http://www.geocaching.com/
Geocaching is a high-tech treasure hunting game played throughout the world by adventure seekers equipped with GPS devices.
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ebooks
Electronic Books
http://en.wikipedia.org/wiki/E-book
For discussion of ebook releases, preferred formats, and ebook readers. Also software and firmware hacks for other compatible devices.
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frogandowl
Frog and Owl
http://frogandowl.org
Group for Frog and Owl -- an open source and open content education project that is operating system and window manager neutral.