MrPostman is an email gateway from local POP clients like Microsoft Outlook, Mozilla's mail client etc. to different web mail services like Yahoo and Hotmail.
It is being designed for extensibility so is easy to add more web mail services to it.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.