Various bits of Code Jeff has written

monitoring
argus	status production vintage 2005 requires perl, a web server, and optionally, sendmail, qpage, fping Description     a system and network monitoring application, with a web front end. Can be configured to monitor just about any TCP, UDP and many other things. Can notify someone about problems via email or qpage. Can automatically escalate if things are not fixed. etc...
programming
Devel::Profile	status stable vintage 2003 Description     a perl module to profile perl programs
Devel::DProfLB	status experimental vintage 2006 Description     a perl module to profile perl programs (Devel::DProf compatible)
Chart::Strip	status stable vintage 2006 Description     a perl module for producing strip chart type graphs
Term::Pager	status stable vintage 2004 Description     a perl module for pagingthrough text, like more or less
Lisp::Fmt	status stable vintage 1998 Description     a perl module implementing lisp's 'format' function
asX	status stable vintage 1994 Description     intel 8048 and intel 8096 assemblers
debug96	status experimental vintage 1992 Description     intel 8096 emulator and debugger
jlisp	status stable vintage 1998 Description     jlisp is a Lisp derived interprter. It is heavily influenced by emacs-lisp, with noticable influences from the suchlikes of scheme, common-lisp, perl, c, ... Designed to be used as an embedded interpreter, it is easily extended and used with both C and C++. (it was originally created for use with a large C++/X11 based medical image analysis program)
system
SYN-fix	status stable vintage 1998 Description     SYN cookie implementation. Binaries for SunOS 4, and source code. See: Dan's Page
SunOS security	status stable vintage 1995 Description     an implemenation of BSD kernel security levels for SunOS 4. in secure mode some special devices become inaccessable, some read-only.
SunOS CIDR	status finicky, but usable, is in use on numerous production systems vintage 1999 Description     a kernel hack for SunOS 4 to permit use of non-classful netmasks. warning: interacts poorly with the SunOS "vif" hack
SunOS BigFS	status stable vintage 1996 Description     code to implement big filesystems (> 2G) in SunOS 4. the SunOS 4 kernel fully supports them as shipped. this replaces several userland utilities (mkfs, fsirand, df, fsck, ...)
suex	status stable vintage 1994 Description     allow some users to run programs as root without entering a password. somewhere in-between su and sudo
sttd	status stable vintage 1999 Description     gateway to log SNMP traps through syslog.
utilities
mkshar	status stable vintage 1992 Description     creates "shell archives" (shar files)
partition	status stable vintage 1999 Description     calculate partition table params. generates output in both *BSD and SunOS style.
digdeep	status stable vintage 2000 Description     "dig" around to uncover nameserver problems.
red	status stable vintage 2000 Description     colorize logfile output. with builtin grep functionality. can color in many colors, the name is historical.
sqlsh	status stable vintage 2001 Description     SQL "shell". connect to SQL database, and execute SQL.
routing
cisco config snapshot	status stable vintage 2001 Description     retreive, archive, and RCS snapshots of cisco configs.
look-bgp	status quick hack vintage 1999 Description     grab BGP table. summarize.
RIPd	status stable vintage 1999 Description     daemon announces routes via RIPv2.
usenet news
sludgepumper	status heavy bitrot (stable with INN-1.5.1-mumble) vintage 1998 Description     a streaming NNTP feeder. higher performance than a well tuned innfeed, and with less resource consumption. this is the code that put news.op.net in the freenix top 10.
autorespond	status stable vintage 1996 Description     auto responder for *.test
news-stats	status stable vintage 1996 Description     generates html showing news stats (count, volume, by group, by hierarchy,...) see http://www.op.net/usenet-stats.html for an example
summarize-log	status stable vintage 1996 Description     takes INN syslog info and generates stats on each feed
nntpsend	status status vintage 1996 Description     a modified version of the nntpsend that comes with inn. it imports any nntplink backlogs, and sorts the batchfile for better performance
snnd	status stable vintage 1996 Description     the SillyNetNewsDaemon, an innd simulator to keep all of the alt.nudie. pictures and alt.|<ooL.wArEZ lusers looking for open news servers, busy
Magnetic Resonance Imaging
mritool	status research vintage 1994 warning not FDA approved for diagnostic use Description     MRI analysis tool.
rdbs	status research vintage 1994 Description     database server for MRI data. handles both GE 4x and 5x MRI data files.
misc.
radio	status experimental vintage 2001 requires an http server (such as Apache), lame, and optionally mod_perl Description     streaming MP3 server. runs as a cgi-bin to stream mp3 files. supports re-encoding to a desired bitrate, multiple channels, and title-streaming (both shoutcast compatable and icecast compatable).
spop	status stable vintage 2000 Description     the Silly POP Daemon. POP simulator, to asist people with mis-configured email clients.
peagnutbutter	status usable vintage 2000 Description     gnutella peer-to-peer file sharing. using a web interface.
draw UUmap	status historical vintage 1992 Description     automatically parses the UUCP maps regurlarly posted to comp.maps.uucp and draws a connectivity map. it is unlikley that this will compile anymore, and it is unlikley you will be able to find the maps.