OST2 2.1 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. This PC software was developed to work on Windows 7 or Windows 8 and can function on 32-bit systems.
Ost2.exe is the frequent file name to indicate this program's installer. The most popular versions of the OST2 are 2.1 and 1.1. The actual developer of the program is 4Team Corporation. We recommend checking the downloaded files with any free antivirus. The program lies within Photo & Graphics Tools, more precisely Converters.
From the developer:
OST2 is a free OST to PST converter for Microsoft Outlook. Just select an OST file and choose the location where you want to save the PST file. OST2 will automatically connect the converted files to Outlook, so you won’t need to import .pst files manually.
You may want to check out more software, such as Ost2Pst Converter Free or OST2PST, which might be related to OST2.