You can download QuacPac 1.3.1 from our software library for free. This program is an intellectual property of OpenEye Scientific Software, Inc. Our built-in antivirus scanned this download and rated it as 100% safe. The most popular version of the software 1.3. QuacPac lies within Education Tools, more precisely Science Tools.
From the developer:
QUACPAC offers everything necessary to do charges well. As the chemistry of molecular interactions is a matter of shape and electrostatics, accurate or at least consistent charge representation is critical in drug design. However even the best charge models are of limited value if protonation states are wrong.
QUACPAC provides pKa and tautomer enumeration in order to get correct protonation states.
You may want to check out more software, such as GenealogyJ, Rhythm & Bio or Maxima and Minima, which might be related to QuacPac.