SourceOffSite 4.2 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. The software lies within System Utilities, more precisely Remote Computing.
The most popular versions of the SourceOffSite 5.0, 4.2 and 4.1. You can launch this PC software on Windows XP/XP Professional/Vista/7/8/10/11 32-bit. The actual developer of the program is SourceGear LLC. 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. Sos.exe is the common file name to indicate this program's installer.
From the developer:
SourceOffSite is a solution to access your SourceSafe data quickly and securely, locally or over the internet. The SOS client has been rewritten from the ground up. It looks, feels, and behaves like a modern, powerful Source Control client — which is just what it is. SOS lets you open multiple tabs, to see simultaneous history views, search results, and project listings all at once.
You may want to check out more software, such as SourceOffSite Server, which might be similar to SourceOffSite.