LORENE - a set of C++ classes to solve various problems arising in numerical relativity, and more generally in computational astrophysics. It provides tools to solve partial differential equations by means of multi-domain spectral methods.
EOSDB - a database providing EoS in data and figures
The Ioffe Institute neutron star EoS site - providing data tables and routines
Stellarcollapse.org - site dedicated to tools for research in stellar collapse, core-collapse supernovae, neutron stars, and gamma-ray bursts.
nEoS- a family of tabulated EoS constrained by ChPT and pQCD.
RelEoS- a collection of tabulated EoS for CCSN and BNS mergers by K. Sumiyoshi