pst-files

Java library for reading Microsoft Outlook pst and ost files

.NET library that supports processing Microsoft PST files written entirely in C#

Import one or more PST files into an exisiting mailbox or a archive

Xst Reader is an open source viewer for Microsoft Outlook’s .ost and .pst files, written entirely in C#. To download an executable of the current version, go to the releases tab.

CSV Database of Exchange Properties from MS-OXPROPS