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Technology Training
Excel Tutorial
Simple and straightforward illustrated tutorials for Microsoft Office Excel, readable free of charge.
CodeSchool
Interactive code teaching; first lessons are free!
GCF Learn Free
Free online classes in a variety of technical and non-technical topics.
MakeUseOf
Tired of tech sites that just aren't updated frequently enough? MakeUseOf has around 20 experienced contributors, so every day sees several new posts recommending essential new software and websites, along with interesting articles on ways to improve your PC and internet life. The best are compiled into free guides on topics like networking, iTunes, Linux and Photoshop.
SecurityTube
Description from Tech Radar
If general video content doesn't appeal to you, don't forget that the internet always has something for every niche. SecurityTube is a YouTube-style site that's specifically for computer security videos, with uploads offering a level of depth you simply won't find elsewhere.
Revision3
Description from Tech Radar
Hours of geek-friendly programming, from meeting the weirdos behind the strangest websites around to full Photoshop tutorials and advice on defeating padlocks.