Jean-Charles Meyrignac's distributed-computing project on equal sums of like powers and the place to look for the current status of the problem.

Chen Shuwen's extensive collection of equal sums of like powers, especially those that are solutions to multigrade equations.

Joseph McLean's investigations into those equations.

Classification of problems related to equal sums of like powers.

Page keeping track of solutions of x^3+y^3+z^3 < 1000 and x^3+y^3+2*z^3 < 1000.

Steve Dutch's page about powers of numbers.

D. J. Bernstein's collection of tools for enumerating small solutions to certain types of equal sums of like powers.

David W. Wilson's list of the smallest number that can be expressed as a sum of two positive cubes in n different ways, for n = 1 through 5.

David W. Wilson's article on his search for the smallest integer that can be expressed as a sum of two positive cubes in 5 distinct ways, up to order of summands.

Dissertation about equal sums of like powers by Tom Womack.