DXSpider is a Ham Radio program that connects to other similar programs by radio or the internet and provides a real-time information service to Ham Radio operators rather like IRC. It is designed to become a complete replacement for the original DOS implementation written by Dick Newell AK1A.
Ion is a tiling (no overlapping windows) window manager that also has PWM-style tabbed frames which can contain multiple client windows. These features help to keep windows organized and to switch quickly between them. Ion was designed primarily as an efficient and unobtrusive window manager for users who prefer the keyboard.
Spinlogs is a shell script for rotating system logs. It is configurable through a text file similar in format and featureset to the newsyslog program in FreeBSD. Any Unix system running ksh should be able to use it. There are many options defining how and when log files should be rotated, and the config file is very straightforward. Rotating log files is a pretty simple task, but some commercial platforms don't include anything better than the old "newsyslog", so this is provided as a system-independent alternative.
IRC Channel Relay Bot allows you to have an IRC channel span multiple IRC networks. It relays public and private messages, informs you about people joining and leaving the channel, and passes topics across networks (if you op it). It has minimal ability to help protect the channel.
pgpmoose is a program that cancels invald messages from moderated Usenet groups. All messages to a specific group are assumed to have a PGP signature added at injection by the newsgroup moderator; if no such signature exists, or if the signature is invalid for the stated moderator of the group, then the message is assumed to be invalid. This program takes care of actually issuing the cancels for those messages.
Spotter is software that can check students' answers to symbolic and numerical problems in math and science. It recognizes an answer regardless of the form it's in, and the instructor can put in helpful hints as responses to frequently-occurring mistakes. Symbolic answers can be input in a notation closely resembling normal human math notation (e.g., xy rather than x*y, and sin x instead of sin(x)). Spotter runs as a Perl CGI application on a Web server; the student doesn't need to install any software.