Computing Minimal Equal Sums Of Like Powers - 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.

Roger Frye's homepage - Discoverer of 422481^4=414560^4+217519^4+95800^4: excellent explanation of how he did it.

Taxicab Numbers - 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.

Tom's Mathematical Things - Dissertation about equal sums of like powers by Tom Womack.

Power Page - Steve Dutch's page about powers of numbers.

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

Massively Parallel Number Theory - Bob Scher and Ed Seidl's search for counterexamples to a generalized version of Euler's conjecture with a 72-node Intel Paragon.

On Equal Sums of Like Powers and Related Problems - Classification of problems related to equal sums of like powers.

The Fifth Taxicab Number is 48988659276962496 - 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.

Equations Involving Sums of Powers - Joseph McLean's investigations into those equations.

Equal Sums of Like Powers - Joe K. Crump's search method that works very well for high powers.

Overview of Mathematician Secret Room - Page keeping track of solutions of x^3+y^3+z^3 < 1000 and x^3+y^3+2*z^3 < 1000.