In comparison to ADF 2007.01, the 2008.01 release offers the following new functionality:
A DFTB program has been added for density functional tight binding calculations, which can for example, be used for preoptimization of the geometry.
A COSMO-RS (COnductor like Screening MOdel for Realistic Solvents) module has been added. COSMO-RS uses the intermediate results from quantum mechanical calculations on individual molecules to predict thermodynamic properties of mixtures of these molecules, for example, solubility.
Apart from this new functionality and performance improvements, certain bugs have been fixed.
The 'NEWCONSTRAINTS' key has been renamed to 'CONSTRAINTS', and the old 'CONSTRAINT' key has been renamed to 'LINEARCONSTRAINTS'. By default the SFO MO coefficients and SFO overlap matrix are no longer printed on standard output (see subkey SFO of the key EPRINT how to include these again).
A more extended list of 'what is new or different' can be found in the Updates document.
