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

  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    Build gen AI apps with an all-in-one modern database: MongoDB Atlas

    MongoDB Atlas provides built-in vector search and a flexible document model so developers can build, scale, and run gen AI apps without stitching together multiple databases. From LLM integration to semantic search, Atlas simplifies your AI architecture—and it’s free to get started.
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  • Secure User Management, Made Simple | Frontegg Icon
    Secure User Management, Made Simple | Frontegg

    Get 7,500 MAUs, 50 tenants, and 5 SSOs free – integrated into your app with just a few lines of code.

    Frontegg powers modern businesses with a user management platform that’s fast to deploy and built to scale. Embed SSO, multi-tenancy, and a customer-facing admin portal using robust SDKs and APIs – no complex setup required. Designed for the Product-Led Growth era, it simplifies setup, secures your users, and frees your team to innovate. From startups to enterprises, Frontegg delivers enterprise-grade tools at zero cost to start. Kick off today.
    Start for Free
  • 1
    Tutanota

    Tutanota

    Open source email service with a strong focus on security and privacy

    Tutanota is an open source email client focused on security and privacy. It is built with end-to-end encryption and 2FA, so you can be assured of utmost email security. Tutanota is always encrypted, so whether you’re using their secure webmail client, mobile apps or desktop clients, you can be sure to communicate securely.
    Downloads: 31 This Week
    Last Update:
    See Project
  • 2
    SaltOS

    SaltOS

    SaltOS, ERP, CRM, Business Management Suite, Josep Sanz Campderrós

    SaltOS is a Business Management solution 100% Cloud Computing. It integrates features like CRM (Customer Relation Management) and ERP (Enterprise Resource Planning). Moreover is it licensed as 100% free software GPL-3.0.
    Downloads: 7 This Week
    Last Update:
    See Project
  • 3
    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: 4 This Week
    Last Update:
    See Project
  • 4
    Downloads: 13 This Week
    Last Update:
    See Project
  • Enterprise-grade ITSM, for every business Icon
    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity.

    Freshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
    Try it Free
  • 5
    IGSuite - Integrated Groupware Suite

    IGSuite - Integrated Groupware Suite

    IGSuite is a web-ajax-based Integrated Groupware Suite

    IGSuite is a web-based Integrated Groupware Suite oriented to be a CRM solution. In the Suite you can find: IGWebMail, IGCalendar, IGContacts, IGArchive, IGWiki, IGTodo, IGChat, Projects, IGFax an HylaFax client, IGFileManager, IGMsg and many other.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 6
    Enhanced packages of Mozilla products for OS/2 and eComStation.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 7
    dracMail Webmail
    dracMail is a webmail interface built using PHP, ExtJS (JavaScript framework), MySQL and IMAP. Features include: Rich UI, WYSIWYG editor, HTML mail composing and message caching.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 8
    RainLoop Webmail (PHP)

    RainLoop Webmail (PHP)

    Simple, modern & fast web-based email client

    Modest system requirements, decent performance, simple installation and upgrade, no database required - all these make RainLoop Webmail a perfect choice for your email solution.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 9
    Speller Pages is a Web interface and JavaScript library for a server-side spell check program. Available in PHP or Perl/CGI versions, Speller Pages allows you to bring the superior spelling suggestion capabilites of GNU Aspell to users of your Web site.
    Downloads: 1 This Week
    Last Update:
    See Project
  • Picsart Enterprise Background Removal API for Stunning eCommerce Visuals Icon
    Picsart Enterprise Background Removal API for Stunning eCommerce Visuals

    Instantly remove the background from your images in just one click.

    With our Remove Background API tool, you can access the transformative capabilities of automation , which will allow you to turn any photo asset into compelling product imagery. With elevated visuals quality on your digital platforms, you can captivate your audience, and therefore achieve higher engagement and sales.
    Learn More
  • 10
    JAM Circle
    JAM Circle is a Kanban Application Platform on Eclipse RCP.Kanban is similar to sticky note.you can use it for GTD,Planning,Pull System using Kanban.It supports to send Card using XMPP and to define it\'s behavior using Script(JRuby and ECMAScript).
    Downloads: 1 This Week
    Last Update:
    See Project
  • 11
    NOTICE: Keep in mind that POP3ye is alpha software and by definition it is a long way from finished. POP3ye is a fully featured web-based e-mail client written in Object Oriented PHP 5. It ony supports the POP3 protocol.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 12
    mailredirect

    mailredirect

    Allow to redirect (a.k.a. "remail") mail messages to other recipients

    The Mailredirect extension for Mozilla Thunderbird and Mozilla SeaMonkey adds the ability to redirect one or more email messages to one or more recipients. The feature of email redirecting is also known as remailing or resending. The extension is an answer for https://bugzil.la/12916
    Downloads: 1 This Week
    Last Update:
    See Project
  • 13
    6XMailer is a PHP POP3 mail reader with support for HTML mail, MIME attachments, embedded mail content, multilingual ready, and themes. It has an address book and centralized configuration file.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    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
  • 15
    Archive This for Thunderbird
    "Archive This" is an add-on for the Thunderbird email client that provides shortcuts for filing messages into folders rapidly and efficiently.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Attachment Reminder is an Add-On (extension) for Mozilla Thunderbird that scans outgoing email for user-defined keywords (or just use the default list), and prompts you if it looks like you wanted to attach a file but didn't.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Bulk Newsletter Mailer (BNM)

    Bulk Newsletter Mailer (BNM)

    BNM helps you design and send massive emails in HTML format

    Bulk Newsletter Platform(BNM) provides the components necessary to send bulk email in HTML format. BNM is written in PHP and it is appropriate to work either standalone on a server or embeded in an existent website. It is an easy to use, marketing tool which allow the user to create and send massive advertisements and newsletters in HTML to his mailing list.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    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
  • 19
    Concisus is a collaborative environment (a groupware) based on the idea of separating application from information. Concisus is a eGroupware branch to provides a framework to manipulate informations and their relations using a web-based interface.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    cymfew : Check Your Mail From EveryWhere :: Access to your mail client from anywhere. POP3 and IMAP supported. Filters...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Deus Ex Email Client
    An email client written in php that emulates the look and feel of the email client shown in the game after hacking into the terminal. The email client hosts a few augmentations that differentiate it from the game version including sending simple emails and replies, email expanding, deletion, draggable windows and customizable graphics.
    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
    Encki Mail is a web based e-mail system that focusses on ease of use for both the user and the system administrator. The project is being developed for Linux using the popular PHP + MySQL combination.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    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
  • 25
    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
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