There was a download of DarunGrim2 2.5.1 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 System Utilities, more precisely File Managers.
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 Jeongwook Oh. The following version: 2.5 is the most frequently downloaded one by the program users. DarunGrim.exe or DarunGrim2.exe are the default file names to indicate this program's installer.
From the developer:
This is a binary diffing tool running on Windows platform. It utilizes the power of IDA disassembler and shows the similar functions and different basic blocks. These functionalities are very useful for analyzing binary security patches without source code.
You may want to check out more software, such as File Substring Replacement Utility, PlexTools Professional HDD or Split it, which might be similar to DarunGrim2.