Multiple Physics Formulae chart. I never knew pinterest would be so helpful for getting through my major!
Not in English, but still lovely lovely math.
If my Physics teacher would've taught about Batman, I would have paid more attention. (I did get an A in the class, don't worry. It would've been an A+ of he taught about Batman)
Physics cheat sheet - Imgur
Ecuaciones de física
How to convert binary numbers to hexadecimal, and visa-versa
Learning to code for free Longlivelearning.com
College hacks. Some if these are pretty bad- like eating a cigarette, but most of the pointers are pretty darn genius!
scriptoriumscriptoria: Alphabet Primer Page from an 1895 book called The Gospel Primer, via Knick of Time