  Introduction of a twist between layers of two-dimensional materials which
leads to the formation of a moir\'e pattern is an emerging pathway to tune the
electronic, vibrational and optical properties. The fascinating properties of
these systems is often linked to large-scale structural reconstruction of the
moir\'e pattern. Hence, an essential first step in the theoretical study of
these systems is the construction and structural relaxation of the atoms in the
moir\'e superlattice. We present the Twister package, a collection of tools
that constructs commensurate superlattices for any combination of 2D materials
and also helps perform structural relaxations of the moir\'e superlattice.
Twister constructs commensurate moir\'e superlattices using the coincidence
lattice method and provides an interface to perform structural relaxations
using classical forcefields.
