Browse free open source Post-Office software and projects for Windows and Mac below. Use the toggles on the left to filter open source Post-Office software by OS, license, language, programming language, and project status.

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  • 1
    Small program, which monitors email account via IMAPS (secure version of IMAP) protocol and inform user about new, unread messages. Coded in Java programming language.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 2
    Cassiopeia's BitMail

    Cassiopeia's BitMail

    Encrypting E-Mail Client

    BitMail is a Proof-of-Concept- / Design-Study for an Qt E-Mail Client. POP3 / IMAP / SMTP / P2P E-Mail-Client. ● Qt E-Mail Client. ● Build-in Encryption to secure E-Mails ● IMAP & POP3 ● Additionally a full decentral P2P Email-Option via the Echo Protocol ● Store Email for Offline-Friends in the P2P Network. ● Chat and Instant Messaging is build in. ● POPTASTIC function (Chat over Email) ● Calendar widget functionality. ● Open Source. BSD License. "Cassiopeia is the tortoise of Momo, which can communicate through writing on her shell and guides into the future." - Wikipedia. Source from: https://sf.net/projects/spot-on/files/ & https://github.com/textbrowser/spot-on
    Downloads: 2 This Week
    Last Update:
    See Project
  • 3
    This is a set of .NET class libraries, designed to use various Internet protocols in a easy-to-use OO matter. So far it contains a POP3 and an IRC (Internet Relay Chat) library.
    Downloads: 0 This Week
    Last Update:
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  • 4
    An IMAP interface for ColdFusion written as a CFC (ColdFusion Component).
    Downloads: 0 This Week
    Last Update:
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  • 5
    IMAPWeb is web-based IMAP client. It is written using Java and uses the Enhydra platform. It supports folders, file attachments (sending and viewing), reply, forward (with attachments) and mail delete.
    Downloads: 0 This Week
    Last Update:
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  • 6
    JFetch is an application to download your email through protocols like POP3 and IMAP. The decision of whether to download a mail or not is made through a sequence of filters. The user can easily add customized filters to this sequence.
    Downloads: 0 This Week
    Last Update:
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  • 7
    Koolwired.Imap is a fully managed .NET IMAP client library written in C#.
    Downloads: 0 This Week
    Last Update:
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  • 8
    MSWeb is a client for Microsoft's Outlook Web Access (OWA). It is intended to deliver mail from a MS exchange server to a UNIX computer. For those who are opposed to 50 MB mailreaders.
    Downloads: 0 This Week
    Last Update:
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  • 9
    Qpopper is the most widely-used server for the POP3 protocol (this allows users to access their mail using any POP3 client). Qpopper supports the latest standards, and includes a large number of optional features.
    Downloads: 0 This Week
    Last Update:
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  • 10
    RSS->IMAP server is a basic IMAP server implementation that allows you to browse your RSS feeds like emails. This is perfect for adding basic RSS functionality to older email clients that do not have RSS readers built in such as Outlook 2003.
    Downloads: 0 This Week
    Last Update:
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  • 11
    A Flex-based IMAP client with a PHP backend.
    Downloads: 0 This Week
    Last Update:
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  • 12
    the project has moved to <a href=http://aptg2.schattenzauberer.de>http://aptg2.schattenzauberer.de</a> visit the project there
    Downloads: 0 This Week
    Last Update:
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  • 13
    HIndi Mail Client in Java, can be extended as a editor and a plugin on web pages to mail and view mails in Unicode Devnagri Font. The Mail Client could be used to embed into a HTML page so that people need not install it to view and recieve mails.
    Downloads: 0 This Week
    Last Update:
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  • 14
    Download email from IMAP server and convert message to simple XML format. See http://vxoware.org/email2xml
    Downloads: 0 This Week
    Last Update:
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