Collision detection & Response
November 2000 - Telemachos
Collision Detection Using Ellipsoids
Pool Hall Lessons: Fast, Accurate Collision Detection Between Circles or Spheres
Jan 2002 - Miles Jackson, Joe van den Heuvel
Collision detection and response between spheres. Very good article as it goes into every detail of the collision detection needed for a pool game. The techniques are not limited to pool games though, e.g. they can easily be used in 3D shooters.
Collision detection with swept spheres and ellipsoids
February 2003 - Jorrit Rouwé
Improved Collision detection & Response
July, 2003 - Kasper Fauerby
This article shows how to do collision detection between an ellipse or swept sphere and triangles. Very good, even for beginners.
Collision Detection and Response
Very good article that explains how to do collision detection between various 2D shapes. Uses interactive images to illustrate examples.
Continuous Collision Detection for translating Ellipsoid
Technical article with detailed mathematical formulae.
A unified framework for rigid body dynamics
Mar, 2006 - Helmut Garstenauer
A detailed article on rigid body dynamics.
Speculative Contacts - a continuous collision engine approach
Mar, 2011 - Paul Firth
Explains a simple collision detection technique that can make physics simulations much more stable.
This site holds lots of interestering documents describing algorithms, mostly on geometrical computation, but also other more generic applications. The site is also home to the programming library Wild Magic, which is available under the Boost license.