Math

• BetterExplained
• Wikipedia: Portale Matematica
• Wolfram MathWorld
• The Magnificent 2D Matrix
• Matematicamente
• Inigo Quilez Website
• Visualizing Quaternions
• Scratch that pixel
• Immersive Linear Algebra

Books

• 3D Math Primer for Graphics and Game Development by Fletcher Dunn and Ian Parbery

ALgorithm & Techniques

• Creative coding algorithms & techniques by Taru Muhonen &Raphaël de Courville