FileZilla Homepage - Open source FTP client software.
FileZilla Documentation - FileZilla Documentation resources.
Free Software Foundation - Home page of the Free Software Foundation. Quoting their page "The Free Software Foundation (FSF), established in 1985, is dedicated to promoting computer users' rights to use, study, copy, modify, and redistribute computer programs.
Getting Started with HTML - Dave Ragget's short introduction to HTML, with links to more advanced topics.
Gimp Homepage - GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.
GNU General Public License - The online version of the GNU General Public License.
Grokking the GIMP - A great tutorial written by Carey Bunks on how to use GIMP. It is available in print or online.
htmlgoodies.com - Commercial site that seems pretty popular.
Jpeg Compression Introduction by Gordon Richardson (Copyright 2003)
World Wide Web Consortium - The W3C is a great resource for web developers. You will find reference information for the various types of markup language, including HTML. From their site "The World Wide Web Consortium (W3C) develops interoperable technologies (specifications, guidelines, software, and tools) to lead the Web to its full potential."
Optimizing Web Graphics - The Great Bandwidth Shortage By Andrew B. King
Other Tutorials - Here are some other tutorials available on the web.
http://fcit.coedu.usf.edu/david/
http://www.math.wustl.edu/~msh210/html.html
http://www.uky.edu/AS/English/writprog/htmlhelp/
http://archive.ncsa.uiuc.edu/General/Internet/WWW/HTMLPrimerAll.html
http://www.engr.psu.edu/wep/undergraduate/computers/basics.htm
http://www.cybercrime.gov - US Department of Justice Cyber crime Site
Wikipedia - A publicly editable dictionary. From their FAQ: "Wikipedia's goal is to create a free, democratic, reliable encyclopedia—actually, the largest encyclopedia in history, in terms of both breadth and depth. This is an ambitious goal, and will probably take many years to achieve!"