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.
LoopTools has been published in Comput. Phys. Commun. 118 (1999) 153 [hep-ph/9807565].
FF has been published in Z. Phys. C46 (1990) 425 [scanned version from KEK: http://ccdb3fs.kek.jp/cgi-bin/img_index?9004168].