  We present an open-source software package WannierTools, a tool for
investigation of novel topological materials. This code works in the
tight-binding framework, which can be generated by another software package
Wannier90. It can help to classify the topological phase of given materials by
calculating the Wilson loop and can get the surface state spectrum which is
detected by angle-resolved photoemission (ARPES) and in scanning tunneling
microscopy (STM) experiments. It also identifies positions of Weyl/Dirac points
and nodal line structures, calculates the Berry phase around a closed momentum
loop and Berry curvature in a part of the Brillouin zone.
