The latest empirical correction for hydrogen bonding (H4) in semiempirical methods.[1] To get the complete D3H4 correction, add also the corresponding D3 dispersion correction. Halogen bonds can be corrected using yet another interface.
Default parameters are available (and automatically assigned) for following semiempirical methods: PM6, AM1, PM3, RM1, OM3 and SCC-DFTB.