the MS-TNEF degenerator is a Web frontend for a command line program called tnef. It accepts a "winmail.dat" file sent by Outlook users, decodes its contents, and lets the user download them. This is meant for users who keep getting Outlook attachments they can't read but don't want to use the command line.
fwanalog is a shell script that parses and summarizes firewall logfiles. It understands logs from ipf (xBSD, Solaris), OpenBSD 3.x pf, Linux 2.2 ipchains, Linux 2.4 iptables, and a few types of routers and firewalls (Cisco, Checkpoint FW-1, and Watchguard). The excellent log analysis program Analog is used to create the reports.