There was a download of Iside 4.2 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions of the Iside are 4.2, 4.1 and 4.0. We recommend checking the downloaded files with any free antivirus. The software lies within System Utilities, more precisely File Managers. Iside.exe or IsideShow.exe are the common file names to indicate the Iside installer. This software is a product of LittleLite Software.
From the developer:
Iside is a hash function or message digest computing tool.
The hash code is the unique fingerprint of a binary or text file. It is produced by a hash function.
File/Folder comparison and file integrity checking is made computing the hash code for each file.
ISIDE computes and displays standard hash codes for any file.
You may want to check out more software, such as IE Throttle, Stellar Phoenix Mailbox Professional or DupFile, which might be similar to Iside.