Many computational intelligence approaches have been used for the fragment assembly problem. However, the comparison and analysis of these approaches is difficult due to the lack of availability of standard benchmarks. Although similar datasets may be used as a starting point, there is not enough information to reproduce the exact overlaps matrix for the fragments used by the various approaches, creating a problem for consistency. This paper presents a collection of benchmark datasets for a wide range of fragment lengths, number of fragments, and sequence lengths, along with a description of the method used to produce them. A website has been created to maintain the datasets and the tables of results at http://chac.sis.uia.mx/fragbench/. Researchers are invited to add to the datasets by following the method described, as well as to submit results obtained by their algorithms on the benchmarks.