tircproxy is a full featured IRC proxy. It can proxy DCC CHAT, DCC SEND and other DCC requests transparently to the user, block common trojans (such as script.ini), hide the user's identity and more. It can be used with the Linux kernel or IPF transparent proxy features to transparently proxy IRC sessions.
Tkchooser is a Tk-based front end to Appletalk and SMB networks. It sits on top of Netatalk and Samba, providing a Macintosh chooser-like GUI to the command line tools. Tkchooser is designed around a modular architecture which allows extension by plugins. Also included is a GUI to GNU enscript as a plugin or standalone program. Tkchooser lets you mount shared volumes, print to network printers, and other fun stuff.