Download of WinKarst 12.5 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within Home & Hobby Tools, more precisely Bookkeeping-Cataloging.
WinKarst.exe is the most common filename for this program's installer. The following version: 12.5 is the most frequently downloaded one by the program users. 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 software is a product of Resurgent Software.
From the developer:
The program enables the user to visualize the cave in three dimensional space and provide information as to the quality of the survey. The user can display, print and export to other computer applications various representations of the cave. WinKarst is undoubtedly the easiest and most powerful software available to map caves.
You may want to check out more software, such as Bibaz or Quest Timer Alpha, which might be related to WinKarst.