links
Loop quantum gravity and
spin foam models
Noncommutative geometry
Introduction
by Thomas Schucker
Matrix models
Lecture on
random matrices by Bertrand Eynard
Causal sets
Review
by Joe Henson
Causal dynamical triangulations
Review
by Jan Ambjorn, Jerzy Jurkiewicz and Renate
Loll
Regge Calculus
Review
by Herbert Hamber
Nonperturbative renormalization
Living
Review by Max Niedermaier and Martin Reuter