Indya Software
PSTXtractor
FreeConvert Microsoft Outlook PST files to EML format.
Windows
MBOXtractor
FreeConvert MBOX files and extract e-mails from MBOX file.
WindowsOSTXtractor
FreeConvert OST file to EML format.
WindowsOperaXtractor
FreeConvert Opera mail to EML file format.
Windows
Google Takeout Extractor
FreeExtract Google Takeout files to EML file format.
Windows