AlterBBN v2: A public code for calculating Big-Bang nucleosynthesis constraints in alternative cosmologies

We present the version 2 of AlterBBN, an open public code for the calculation of the abundance of the elements from Big-Bang nucleosynthesis. It does not rely on any closed external library or program, aims at being user-friendly and allowing easy modifications, and provides a fast and reliable calculation of the Big-Bang nucleosynthesis constraints in the standard and alternative cosmologies. The previous version of this program (AEMH_v1_0) may be found at http://dx.doi.org/10.1016/j.cpc.2012.03.018.