Download of CM PST File Converter 21.1 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The software lies within Business Tools, more precisely Project Management. The actual developer of the program is CloudMigration.
From the developer:
CloudMigration PST Converter is an excellent tool that help users to convert Outlook PST file to various file formats and email clients. The software allows you to add single as well as multiple PST files to several file formats such as PST, EML, EMLX, MBOX, MSG, HTML, PDF, etc. The software also offers you to export Outlook data files to numerous email clients like Office 365, Gmail, Thunderbird, Yahoo, etc.
You may want to check out more software, such as MailsDaddy PST File Converter, MigrateEmails PST File Converter Tool or NSF File Converter Freeware, which might be similar to CM PST File Converter.