This page lists a few projects that I have been involved in:

BSD Magazine
Issue 4
Feb. 2009
Open Source Studio to Transmitter Link (OSSTL)
http://www.bsdmag.org/prt/view/about-the-magazine/issue/993.html
local pdf copy

check_pop3_account
Nagios check plugin that monitors a POP3 account.
http://www.nagiosexchange.org/cgi-bin/page.cgi?g=2880.html

Email Print Gateway
Grab email off a POP3 account and print it to a printer.
Uses only software that comes with Slackware: mailx, fetchmail, cupsd...
Email_to_printer_gateway.pdf

check_dell_openmanage
Nagios check plugin that monitor Dell servers.
It has become quite popular and is used all over the world.
http://www.nagiosexchange.org/cgi-bin/page.cgi?g=1437.html

OSSTL: Open Source Studio to Transmitter Link (STL)
A Studio to Transmitter Link created with (mostly) Open Source Software
(In use by a local FM and two local AM radio stations)
OSSTL_Document.pdf (ver. 0.0.4)

Flickr Pitchr Frame
Turn an old laptop into a picture frame that displays dynamic content from Flickr.com. The project is written in Python. It uses SDL via pygame for graphic display. The virtual machine available for testing is a small Slackware VM.
http://code.google.com/p/flickr-pitchr/

Linux Journal
Issue 117
Jan. 2004
Controlling Devices with Relays
http://www.linuxjournal.com/article/6693
local pdf copy

HelpmeICT - added Active Directory (AD) authentication support
ENHANCEMENT - (Beta) support for authenticating against an Active Directory server. Thanks to Jason Ellison for the patch.
http://helpdesk.centralmanclc.com/

WinVNC modification
using URL protocol handlers in windows
http://www.realvnc.com/pipermail/vnc-list/2003-October/041408.html