LoopTools is a package for evaluation of scalar and tensor one-loop integrals based on the FF package by G.J. van Oldenborgh. It features an easy Fortran, C++, and Mathematica interface to the scalar one-loop functions of FF and in addition provides the 2-, 3-, and 4-point tensor coefficient functions.

The publication associated with LoopTools is: T. Hahn, M. Pérez-Victoria. Automated one-loop calculations in four and D dimensions, Comput. Phys. Commun. 118 (1999) 153. DOI: 10.1016/S0010-4655(98)00173-8