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.

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

Dissertation about equal sums of like powers by Tom Womack.

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

Joe K. Crump's search method that works very well for high powers.