Nuclear Astrophysics Data:

• Bruxelles Nuclear Astrophysics Site (with NACRE data and reaction network generator)
• Jacob Fisker's Shell Model Rates for A=45-63
• LANL T2 Theory Division - Theoretical Nuclear Astrophysics Data
• LLNL Nuclear Astrophysics Data - Abundances, Reaction rates
• NACRE Home Page
• NucAstroData - Repository for several reaction rate compilations
• Oak Ridge Nuclear Astrophysics Data Site (some reaction rates)
• Tommy Rauscher's NON SMOKER reaction rates page
• UNC Astrophysics Page with Christian Iliadis' rate compilation in electronic form

Nuclear Data:

• Atomic Mass Data Center
• Brookhaven Nuclear Data Center (all sorts of data)
• NIST Physics Reference Data
• NIST X- and g-ray mass attenuation coefficients
• Nuclear Wallet Cards (part of Brookhaven, experimental masses, decay half lives and branchings, gs and isomer spins)