Recently, I took the time to download and sort through hundreds of tutorials. This package is the product of all that monotonous saving and sorting.
Among the handful of novice tutorials, there's some quality in-depth articles included by respected mappers like Hourences, Gui and Mr. Prophet.
The design tips by DavidM, Plutonic and Goldabar are also great reading. (Check the assorted folder)
I've done my best to weed out the poorly composed tutorials by noob authors.
Package Preview: LINK: http://www.mediafire.com/?ll4sq44r9cxcr3e
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Have other good quality or hard-to-find tutorials? Link them here and I'll create an expansion pack.
Long Live UT99

EDIT: Smaller file now. Removed unrelated Photoshop tutorials and added a slideshow by Carthage.