Software package barvinok. barvinok is a library for counting the number of integer points in parametric and non-parametric polytopes. For parametric polytopes an explicit function in the shape of a piece-wise step-polynomial is constructed. This is a generalization of both Ehrhart quasi-polynomials and vector partition functions. Alternatively, a generalized Ehrhart series can be constructed as well. The library includes isl and PolyLib and uses NTL.