NN-Online provides a source for the physics community to access the work of current and former members of the Theoretical High Energy Physics Group of the University of Nijmegen, the Netherlands. The work found here emphasizes the baryon-baryon interaction, including the nucleon-nucleon interaction, hyperon-nucleon interaction, antinucleon-nucleon interaction and pion-nucleon interaction. Researchers can use the interactive capabilities of the site to "instantaneously calculate and plot phaseshifts, scattering amplitudes and observables for several models of the NN interaction." They can also access the world database of low and intermediate energy nucleon-nucleon scattering data. Other features include an interactive Hyperion-Nucleon data page and an E-prints archive containing downloadable papers from 1970 through 1999 (.txt, .ps, .pdf).