scallop: A program to compute with surfaces in free groups and free products of cyclic groups. Scallop now contains the (improved) functionality from scallop, scylla, trollop, gallop, and scabble. Scallop requires GMP and GLPK, and supports using Gurobi as a linear programming solver. Also available via git at git@github.com:aldenwalker/scallop.git.