Presentation Codepen: http://codepen.io/ericterpstra/pen/DHbaK
Original Codepen by Lucas Bebber: http://codepen.io/lbebber/pen/xrwja

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Background-clip: text

Divya Manian – Using Background Clip for Text With CSS Fallback.
Codrops – Experiments With Background-Clip: Text

RGBa

MDN – <color>
CSS-Tricks – RGBa Browser Support
Devoth’s HEX 2 RBGA Color Calculator

Text-Shadow

Mozilla Developer Network – Text-Shadow
CSS Tricks – CSS Text Shadow

CSS3 Animation

Smashing Magazine – The Guide To CSS Animation: Principles and Examples
MDN – Using CSS Animations
Justin Aguilar – CSS3 Animation Cheat Sheet
CSS3 Maker – CSS 3.0 Animation
CSS Animate (Visual animation timeline editor) Beta.

CSS3 @keyframe syntax

MDN – @keyframes
CSS-Tricks – Keyframe Animation Syntax
Smashing Magazine – An Introduction To CSS3 Keyframe Animations