The tutorials below explain some of my favorites open-source technologies. I created some of them and used the others. I have rated them based on clarity of explanation to the intended audience. A low rating doesn’t necessarily indicate a bad tutorial, but rather how well the content is communicated to a beginner.
If you would like to see tutorials added to this list, contact me with the URL and a description. If it’s better than something listed or offers additional skills, I’ll add it.