wavemon is a ncurses-based monitor for wireless devices. It allows you to watch the signal and noise levels, packet statistics, device configuration, and network parameters of your wireless network hardware. It has currently only been tested with the Lucent Orinoco series of cards, although it should work (with varying features) with all devices supported by the wireless kernel extensions written by Jean Tourrilhes.
APLM (Alex Personal Library Manager) is a set of Perl scripts for managing a small library. It is designed to be easy to set up, easy to use, very customizable, and self-contained. It lets you type in your books, change a few paths, and get going without worrying about MySQL or anything. It also has a Web interface.
DNS Hijacker is a libnet/libpcap based DNS sniffer/spoofer. A versatile tool, it supports tcpdump-style filters that allow you to specifically target victims. DNS answers are forged based on entries in a "fabrication table" or by simply forging one answer to all requests. A print-only mode is also supported, allowing one to simply monitor DNS traffic. DNS Hijacker is an excellent tool for blocking and removing advertisements at the network level. The package comes with a default rule file for blocking about 780 known ad servers, as well as instructions on how to incorporate with RRDTool for ad blocking statistics generation.
ImLib3D is a C++ library and visualization system for 3D (volumetric) image processing. It contains most basic image processing algorithms, as well as some more sophisticated ones. Its images are STL-compliant templated containers. It inculdes a viewer that features multiplanar views, interactive image processing, animations, vector field views, and 3D (OpenGL) multiplanar. Its main application is medical image processing.