A Chimera GUI extension to create Gaussian input files.
A fork of ebsel is distributed with QMSetup, which in turn uses data from BSE.
The Role of Databases in Support of Computational Chemistry Calculations
--Feller, D.; J. Comp. Chem., 17(13), 1571-1586, 1996.
Basis Set Exchange: A Community Database for Computational Sciences
--Schuchardt, K.L., Didier, B.T., Elsethagen, T., Sun, L., Gurumoorthi, V., Chase, J., Li, J., and Windus ; T.L. J. Chem. Inf. Model., 47(3), 1045-1052, 2007, doi:10.1021/ci600510j.