MIP Instances A Collection of Mixed Integer Programming Instances Collected by Jeff Linderoth from a number of sources, including instances submit to the NEOS Server. Files are in bzipped MPS format.

SPP Instances A Collection of Set Partioning Problem Instances, from the paper A Parallel, Linear Programming Based Heuristic for Large Scale Set Partitioning Problems, by J. T. Linderoth, E. K. Lee, and M. W. P. Savelsbergh, that appeared in INFORMS Journal on Computing, 13 (2001), pp. 191-209.

SP Instances Stochastic linear programming instances created or collected by Jeff Linderoth. Files are in (bzipped) SMPS format.

QAPLIB Instances
A collection of Quadratic Assignment Problem instances collected by R.E. BURKARD, E. ÇELA, S.E. KARISCH and F. RENDL.