capictcha generates CAPTCHA images from arbitrary strings. It supports the use of any TrueType/OpenType font and an alternate (more stable) font for punctuation and other characters, and allows you to specify the size and output text, JPG or PNG graphic output, and MD5 lookups of values you don't want to expose as plain text (which could be used to give a simple text table relating email addresses to their hex MD5 hash). Individual character tweaks, overstriking, and random lines are easily configurable.
X10MMS is a software suite that provides support for the X10 CM19A USB home automation transceiver under Linux. It allows users to control the device directly, sending and receiving basic on/off commands, and also includes a sample application that allows XMMS to be remotely controlled using the CM19A transceiver and an X10 palmpad remote. The current CM19A driver is implemented as a kernel module and requires an up-to-date 2.6.x kernel. The program is completely user configurable via a straightforward text file, so you can assign any supported function to any toggle key on the remote.