eFunda
E Funda: Properties of Logarithmic Functions
A list of properties of logarithmic functions. A handy reference tool while working problems.
Other
Principia Cybernetica Web: Logarithm
Short site with links to related sites on the topic of the Logarithm
Johan Claeys
Problems About Exponential and Logarithmic Functions
This site presents a set of problems in exponential and logarithmic functions and walks the student through the procedure for solving the problem.
Interactive Mathematics
Interactive Mathematics: Graphs of Exponentials & Logarithms
Interactive graphs of base 10 exponential and logarithmic functions are demonstrated and applied to real-world problems.