Open OST in Outlook - Version 3.7 You can download demo version of Open OST in Outlook software for OST PST Conversion and open OST without Outlook in free of cost. With the help of this open OST file as PST tool you can open Outlook OST file and its items as emails, messages, tasks, notes, calendars, contacts, to-do list, journals, meetings and components as inbox, send item, drafts, deleted items and junk mailbox etc. Instantly open OST file Outlook & convert OST to PST Outlook 2010 with Our OST PST Conversion software. With the help of Open OST file as PST tool transfer and restore OST files data to PST, MSG & EML file formats. It smoothly Open OST to PST with original TXT, RTF & HTML file formats. Open OST in Outlook tool to install & uninstall on such all supported OS as Win2000, Win7 x32, Win7 x 64, Win98, Win Server 2003/2008, Win Vista, Win Vista x64, WinXP, WinNT, Win8 x32 and Win8 x64 versions. Open OST file software supports all Microsoft Exchange server (.OST) version as 5.0, 5.5, 2000, 2002, 2003, 2007, 2010 and 2013 etc and co-operative with almost MS Outlook all versions as 2003, 2007 and 2010 or 2013.