  The ExoMol project is dedicated to providing molecular line lists for
exoplanet and other hot atmospheres. The ExoMol procedure uses a mixture of ab
initio calculations and available laboratory data. The actual line lists are
generated using variational nuclear motion calculations. These line lists form
the input for opacity models for cool stars and brown dwarfs as well as for
radiative transport models involving exoplanets. This paper is a collection of
molecular opacities for 52 molecules (130 isotopologues) at two reference
temperatures, 300 K and 2000 K, using line lists from the ExoMol database. So
far, ExoMol line lists have been generated for about 30 key molecular species.
Other line lists are taken from external sources or from our work predating the
ExoMol project. An overview of the line lists generated by ExoMol thus far is
presented and used to evaluate further molecular data needs. Other line lists
are also considered. The requirement for completeness within a line list is
emphasized and needs for further line lists discussed.
