This package computes the integral closure of a ring via the algorithm in Theo De Jong's paper, An Algorithm for Computing the Integral Closure, J. Symbolic Computation, (1998) 26, 273-277, for a ring in any characteristic. It also includes functions that uses the algorithm of Anurag Singh and Irena Swanson given in arXiv:0901.0871 for rings in positive characteristic p. The fractions that generate the integral closure over R are obtained with the command ICfractions R if you use De Jong's algorithm via integralClosure R and the output of Singh and Swanson's algorithm is already these fractions.