A Bushel of Free FOSS Tutorials
You can't knock a good FOSS tutorial. While documentation, including tutorials, is often a weakness with open source applications--even very established ones--the good news is that there are some outstanding free tutorials on the web. They're available for many projects and platforms. Sometimes these are delivered by the community behind particular projects, and sometimes they are from enthusiasts and other third parties. In this post, you'll find many of them.
GIMP is viewed by many as the definitive open source graphics application, and there are a number of outstanding, free tutorials for it on the web. Check out Gimp-Tutorials.net which includes video tutorials and much more. Also look into Grokking the GIMP--a complete, free online book.
Free Firefox tutorials abound on the web. Newbie's tutorial is worth spending some time with. Extend Firefox is a very complete site for people who want to develop extensions for the browser. Also, see OStatic's own collection of Firefox tips and favorite extensions.
There are many free OpenOffice tutorials on the web. You can find individual tutorials for the various applications in the suite here. My favorite OpenOffice tutorials, including Flash demos, are at LearnOpenOffice.org. Definitely check these detailed lessons out.
MySQL tutorials can really help demystify deploying and securing your database applications. Here's an easy-to-follow example.
Getting into open source customer relationship management? SugarCRM is the product many people reach for, and SiteGround's free tutorial will get you going. If you're interested in vTiger--also open source CRM software--Siteground has a tutorial that includes information on installing vTiger on your web site.