Just wanted to let the Community know that a new package from Hiren H. Patel is available.
Package-X, a Mathematica package for the analytic computation of
one-loop integrals dimensionally regulated near 4 spacetime dimensions
is described. Package-X computes arbitrarily high rank tensor
integrals with up to three propagators, and gives compact expressions
of UV divergent, IR divergent, and finite parts for any kinematic
configuration involving real-valued external invariants and internal
masses. Output expressions can be readily evaluated numerically and
manipulated symbolically with built-in Mathematica functions. Emphasis
is on evaluation speed, on readability of results, and especially on
user-friendliness. Also included is a routine to compute traces of
products of Dirac matrices, and a collection of projectors to
facilitate the computation of fermion form factors at one-loop. The
package is intended to be used both as a research tool and as an
educational tool.