CueMol 2.2.3.443 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free software was originally developed by BKR Laboratory. The most popular versions of the CueMol 2.2, 2.1 and 2.0. We recommend checking the downloaded files with any free antivirus. The program relates to Education Tools. Cuemol.exe or cuemol2.exe are the common file names to indicate the CueMol installer.
From the developer:
CueMol is a computer program for macromolecular structure visualization. CueMol performs the needed operations to visualize and create the publication-quality images of the macromolecular structures with user-friendly interfaces. Currently supported files are molecular coordinates (PDB format), electron density (CCP4, CNS , and MTZ formats), MSMS surface data, and APBS electrostatic potential map (OpenDX format).
You may want to check out more software, such as SweetMollyGrace, which might be similar to CueMol.