There was a download of PloComp 11.01 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This software is an intellectual property of Isoplotec Corporation.
The following versions: 10.1, 10.0 and 9.0 are the most frequently downloaded ones by the program users. We recommend checking the downloaded files with any free antivirus. PloComp.exe is the frequent file name to indicate the PloComp installer. The program lies within Photo & Graphics Tools, more precisely Viewers & Editors.
From the developer:
PloComp is viewer which views in piles, or arranges and views plural drawing files. Old and new drawing comparison can be performed by recognition of different colors and change area by cloud mark.
You may want to check out more software, such as PloCompAuto, which might be related to PloComp.