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Browse free open source Email Clients and projects below. Use the toggles on the left to filter open source Email Clients by OS, license, language, programming language, and project status.

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    MongoDB Atlas runs apps anywhere

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  • 1
    OpenChange Project

    OpenChange Project

    Microsoft Exchange compatible server and client libraries

    OpenChange is a portable Open Source implementation of Microsoft Exchange server and Exchange protocols. It provides a complete solution to interoperate with Microsoft Outlook clients or Microsoft Exchange servers. OpenChange client-side library is used in existing messaging clients and is the solution in new projects to communicate natively with Microsoft Exchange and Exchange-compatible servers. OpenChange server is a transparent Microsoft Exchange server replacement using native Exchange protocols and does not require any plugin installation in Outlook.
    Downloads: 14 This Week
    Last Update:
    See Project
  • 2
    PHP app to access Gmail/Googlemail/Gmail-for-Your-Domain accounts on wireless devices. Convenient alternative access method to your email account on the move, gmail-mobile incorporates as many Gmail features as possible within limits of a mobile device.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 3
    Downloads: 6 This Week
    Last Update:
    See Project
  • 4
    Eclipse Mail

    Eclipse Mail

    eMail is a fork of Interlink for IA-32 i686 with more optimizations.

    Eclipse Mail is a fork of Interlink Mail and News made for Windows XP and runs on IA-32 i686 platforms. Some advantages over upstream and roytam1's mailnews are more optimizations and better interoperability with upstream. (using SQL storage intead of DBM)
    Downloads: 3 This Week
    Last Update:
    See Project
  • Combine Jira and SCM data to improve team performance Icon
    Combine Jira and SCM data to improve team performance

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  • 5
    a webbased desktop, which handles modules like email-app and so by a webclient. Today only for Mozilla like Browsers. Tester/Developer are welcome :) Check it out on http://x.nebulon.de/netdesk/
    Downloads: 3 This Week
    Last Update:
    See Project
  • 6
    Geedot aims to be a lightweight, fully (and only) HTML 4.01 and CSS compliant and functional web browser for X. It uses the gdtoolkit widget set which is very fast and lightweight - yet also infinitely and easily expandable.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    Popper is a Web based mail client that allows you to access your personal mailboxes on POP3 servers.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8

    Bulk Email Sender

    MOX Bulk Email Sender is free and powerful bulk email sender script

    MOX Bulk Email Sender is free and powerful bulk email sender script to create and send to your email lists. Installation: 1. extract the bulk emailer archive. 2. Upload the whole directory "emailer" to your web root directory. 3. Give the permissions 777 to the directories "emailer/lists/" and "emailer/log/". 4. Open the url "http://www.yourwebsite.com/<your web-root-directory>/php/emailer.php". 5. Now you can use the script - have fun ! Download PHP Scripts : http://microcode.ws/ Cheap Web Hosting + FREE Domain : http://goo.gl/HY7Ubq
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9
    AfterLogic WebMail Lite .NET
    Free and easy-to-use webmail script with AJAX interface. Supports POP3/IMAP accounts, SMTP, SSL. Users can check and send mail, use address book. Skins, non-English languages, UTF-8. MS SQL/MySQL/MS Access backends supported.
    Downloads: 0 This Week
    Last Update:
    See Project
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  • 10
    AfterLogic WebMail Lite 7
    AfterLogic WebMail Lite PHP is a free AJAX webmail application. Users can receive, view, manage, compose, and send email through web interface (IMAP and SMTP supported). Source code included.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Amphora Light is a Web-based groupware server written in Python and Zope. It offers basic office functionality: document sharing, calendars, tasks, contacts, internet databases in the context of a hierarchical organization and flexible access rights.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    AUC for Education is an GPLed intranet system designed for use in a K-12 setting that provides a web-based environment for students and teachers to interact via "Interactive Classrooms" and other innovative features.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Belarusian localization of Mozilla Application Suite, Mozilla Firefox, Mozilla Thunderbird, SeaMonkey.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    BlogMail software is a CMS and a Webmail application integrated in one. It's based on WordPress MultiUser and has all the functionality of this, like RSS and comments, plus support for LDAP, smarty templates, automatic subdomains and antispam filtering.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    I often encountered an inability among users to think beyond SAP and MS. Goal of the project is to create a web based application management platform, which enables organisations to easily manage applications within the system.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    CellMate Bot currently allows google queries and aim functions through OSCAR. Made to be used form your cellphone's AIM client, CellMate Bot will be updated to include email, news and map directions in the future. For now, you can use Google SMS.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    CollabOffice is a web based Personal Information Manager (PIM) which allows teams to share and work together. It provides email, documents, calendar, contacts, instant messaging, news (nntp), and online web based administration.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Edbrowse is a comprehensive editor, browser, and email client that provides access to the net through a command line interface, appropriate for speech or braille. It also supports scripting, to interact with the net in the background, or in batch mode.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Conflux is a Web-based groupware and file management solution intended to organise and facilitate peoples work at the office. The basic functionality includes a file depository, shared calendars, tasks, contacts, discussions, and an email client.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Diom Webmail is a webmail client written in PHP to interact with an IMAP server. Diom Webmail is easily configurable, with common features like sending and recieving messages and attachements, as well as an address book, and spell check.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Draconis is a suite with several Internet Programs for the ATARI platform. It contains clients and drivers for a sucessful internet access.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    EGroupware Enterprise Collaboration
    EGroupware has moved to Github, please find all our downloads there: https://github.com/EGroupware/egroupware/releases EGroupware is a multi-user, web-based groupware suite. Currently available modules include: email, addressbook, calendar, infolog (notes, to-do's, phone calls), content management, wiki, project management, tracker, timesheet, knowledge base, CalDAV/CardDAV
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Eridu is a web based groupware package written in PHP that aims to provide all the functionality expected of a professional groupware package such as MS Outlook+Exchange or Lotus Notes+Domino.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    Farsi Translation of Mozilla-based Browsers. FarsiMoz is initiated with the hope of making Mozilla-based internet clients more accesseblie to Iranians every where. We started translation from Mozilla 1.2 and will translate other versions in the near
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    Helps passing of relevant arguments to Mozilla (Gecko) based applications from a simple, descriptive GUI. Can save these 'Launchlets' to system tray, Start Menu, or Desktop. Simplifies managing multiple profiles, testing extensions, and troubleshooting
    Downloads: 0 This Week
    Last Update:
    See Project
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