Downloading WinMOPAC 2.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free software is a product of Roman Shchepin. The software is categorized as Business Tools.
From the developer:
WinMopac is a powerful tool for semi empirical calculations of chemical molecules. This program has unified old DOS version MOPAC7 with some improvements which we have made and a convenient windows interface, and an integrated external molecular viewer(RasWin). The Windows interface includes all editing functions, a setting menu and some other features.
You may want to check out more software, such as HelpSpot, MAUS MasterPlan or ManagePro, which might be similar to WinMOPAC.