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The 21-cm signal from the Epoch of Reionization (EoR) is expected to bedetected in the next few years, either with existing instruments or by theupcoming SKA and HERA projects. In this context there is a pressing need forpublicly available high-quality templates covering a wide range of possiblesignals. These are needed both for end-to-end simulations of the up-cominginstruments, as well as to develop signal analysis methods. In this work wepresent such a set of templates, publicly available, for download athttps://21ssd.obspm.fr/. The database contains 21-cm brightness temperaturelightcones at high and low resolution, and several derived statisticalquantities for 45 models spanning our choice of 3D parameter space. These dataare the result of fully coupled radiative hydrodynamic high resolution($1024^3$) simulations performed with the LICORICE code. Both X-ray and Lymanline transfer is performed to account for heating and Wouthuysen-Field couplingfluctuations. We also present a first exploitation of the data using the powerspectrum and the Pixel Distribution Function (PDF) as functions of redshifts,computed from lightcone data. We analyse how these two quantities behave whenvarying the model parameters while taking into account the thermal noiseexpected of a typical SKA survey. Finally, we show that the power spectrum andthe PDF have different -- and to some extent complementary -- abilities todistinguish between different models. This opens the door to formulating anoptimal sampling of the parameter space, dependant on the chosen diagnostics.

21SSD: a public database of simulated 21-cm signals from the epoch of reionization