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The non-Maxwellian $\kappa$-distributions have been detected in the solartransition region and flares. These distributions are characterized by ahigh-energy tail and a near-Maxwellian core and are known to have significantimpact on the resulting optically thin spectra arising from collisionallydominated astrophysical plasmas. We developed the KAPPA package(http://kappa.asu.cas.cz) for synthesis of such line and continuum spectra. Thepackage is based on the freely available CHIANTI database and software, and canbe used in a similar manner. Ionization and recombination rates together withthe ionization equilibria are provided for a range of $\kappa$ values.Distribution-averaged collision strengths for excitation are obtained by anapproximate method for all transitions in all ions available within CHIANTI.The validity of this approximate method is tested by comparison with directcalculations. Typical precisions of better than 5% are found, with all casesbeing within 10%. Tools for calculation of synthetic line and continuumintensities are provided and described. Examples of the synthetic spectra andSDO/AIA responses to emission for the $\kappa$-distributions are given.

KAPPA: A Package for Synthesis of optically thin spectra for the non-Maxwellian kappa-distributions based on the CHIANTI database