Drbd is a block device which is designed to build high-availability clusters. This is done by mirroring a whole block device via a (dedicated) network. You could see it as a network raid 1.
glinuxsms is a GNOME2 front-end for linuxsms
that lets you send SMS messages to cell
phones all over the world.
A GTK2-based scientific calculator with algebraic, RPN, and formula entry modes.
A PHP class for generating PDF documents.