Showing 442 open source projects for "open source pos"

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  • 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.
    5.0 out of 5 stars 1 Review
    Downloads: 35 This Week
    Last Update:
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  • 2
    Mailspring

    Mailspring

    A faster, leaner email client and fork of Nylas Mail

    Mailspring is a fast and lean mail client that’s a new version of Nylas Mail. It’s maintained by one of Nylas Mail’s original authors, with plenty of great features and enhancements such as a new C++ sync engine that allows it to use 50% less RAM. Heavy dependencies have also been removed and the package manager rewritten for even greater speed. Written in TypeScript with Electron and React, it is cross-platform (macOS, Windows and Linux) and designed to be easy to extend.
    Downloads: 20 This Week
    Last Update:
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  • 3
    Meru

    Meru

    Gmail desktop app for macOS, Windows & Linux (formerly Gmail Desktop)

    Meru, formerly Gmail Desktop, is an open-source desktop email application designed to provide a dedicated Gmail experience outside the web browser. It allows users to access their Gmail inboxes through an independent application for Windows, macOS, and Linux. The software supports multiple Gmail accounts and provides native desktop notifications for incoming messages. It includes advertisement and tracker blocking to reduce distractions while managing email.
    Downloads: 15 This Week
    Last Update:
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  • 4
    Proton Mail Bridge

    Proton Mail Bridge

    Proton Mail Bridge application

    Proton Mail Bridge is a desktop application that runs in the background on Windows, macOS, and Linux to enable users to access their Proton Mail encrypted email accounts with traditional email clients like Outlook, Thunderbird, Apple Mail, and others via local IMAP/SMTP servers. Because standard IMAP cannot natively decrypt end-to-end encrypted messages, Bridge acts as a translator that downloads encrypted mail, decrypts it locally, and serves it to your preferred mail client over a local...
    Downloads: 13 This Week
    Last Update:
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  • 5
    Cypht

    Cypht

    Lightweight Open Source webmail written in PHP and JavaScript

    ...Cypht is an application built entirely of plugins, or as we call them, module sets (which is obviously way cooler sounding than plugins), that are executed by the framework. Modules provide a flexible way to add new features or customize the program without hacking the code. Cypht is Open Source (LGPL V2), and written in PHP and JavaScript.
    5.0 out of 5 stars 1 Review
    Downloads: 8 This Week
    Last Update:
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  • 6
    Proton Web Clients

    Proton Web Clients

    Monorepo hosting the proton web clients

    Proton Web Clients is a monorepo hosting the web applications for Proton’s suite of privacy-focused services, including the core Proton Mail webmail interface and related web apps like Proton Calendar, Proton Drive, Proton Account, Proton VPN, Proton Pass, and other connected tools. It consolidates all web client code, shared modules, dependencies, and development tooling into a single repository, enabling unified maintenance, consistency of design patterns, and efficient evolution of...
    Downloads: 8 This Week
    Last Update:
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  • 7
    Meron

    Meron

    Fast, secure email client with chat and kanban views

    Meron is a free, open-source email client designed to combine traditional email management with chat-style conversations and Kanban organization. It provides a unified inbox for managing multiple email accounts through IMAP and SMTP. Users can switch between conventional email, threaded chat, and Kanban board views. The software includes customizable tags, automated filtering rules, and rich-text message composition.
    Downloads: 7 This Week
    Last Update:
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  • 8
    mail

    mail

    Built from the ground up for speed

    Flectar Mail is an open-source email, calendar, and contact management application built with Rust for native performance and low memory consumption. It supports Windows, macOS, Linux, Android, and iOS, with mobile installation availability varying by platform. Users can connect Gmail, Outlook, Microsoft 365, and standards-based email services through IMAP, POP3, SMTP, and JMAP.
    Downloads: 6 This Week
    Last Update:
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  • 9
    unimail-client

    unimail-client

    This is the first executable client program of Unimail

    Unimail Client is a free, open-source command-line application for sending emails through the Unimail service. Built with Go, it uses the Unimail Go SDK to handle email delivery requests. Users can send plain-text messages or formatted HTML emails directly from a terminal. The application supports multiple recipients, carbon copies, blind carbon copies, and file attachments.
    Downloads: 1 This Week
    Last Update:
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  • 10
    deltachat-desktop

    deltachat-desktop

    Decentralized private messenger with chat-shared tools and games

    deltachat-desktop is an open-source, decentralized messaging application that enables private communication through email-based messaging infrastructure. It provides a familiar instant messaging interface while using interoperable standards instead of relying on a centralized messaging platform. Conversations are protected with end-to-end encryption designed to safeguard messages against unauthorized access.
    Downloads: 0 This Week
    Last Update:
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  • 11
    Windows MBox Viewer

    Windows MBox Viewer

    Windows eml and mbox viewer.

    Free Windows Mbox Viewer. Gain access to mbox archives, single eml or single Outlook messages. View attachments and export single mails in eml format. Access large mbox files such as Google Takeout or Mozilla Thunderbird Archives. Development of mbox viewer continues now at github: https://github.com/eneam/mboxviewer **NOTE**: Windows Defender may sometimes report incorrectly that mbox-viewer contains malware. Please report the case to the development. Development will ask...
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    4.6 out of 5 stars 22 Reviews
    Downloads: 1,143 This Week
    Last Update:
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  • 12
    SquirrelMail
    SquirrelMail is a PHP-based Web email client. It includes built-in pure PHP support for IMAP and SMTP, and renders all pages in pure HTML 4.0 for maximum compatibility across browsers. It has strong MIME support and a flexible plugin system.
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    4.7 out of 5 stars 62 Reviews
    Downloads: 180 This Week
    Last Update:
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  • 13
    NOCC
    NOCC is a simple and fast Webmail client which can handle POP3 and IMAP mailboxes and sends email via SMTP. It is written with PHP, has low requirements (no database, frames). Features multi-language support, MIME attachments, displays HTML messages. The installation guide comes with the source code: https://sourceforge.net/p/nocc/code/HEAD/tree/trunk/webmail/docs/INSTALL If you encounter problems or bugs you can always try the current HEAD...
    5.0 out of 5 stars 5 Reviews
    Downloads: 8 This Week
    Last Update:
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  • 14
    MultiMail Offline Reader
    MultiMail is an offline mail packet reader for Unix and other systems. It currently supports the Blue Wave, QWK, OMEN, OPX and SOUP formats. It has a full screen, color user interface, built with the curses library.
    5.0 out of 5 stars 1 Review
    Downloads: 6 This Week
    Last Update:
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  • 15
    Email of Death
    Email of Death is a browser based email client. 10-9-26: Fixed a couple of bugs.
    Downloads: 3 This Week
    Last Update:
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  • 16
    An extremely configurable portable GUI email and news client for Windows/Unix (including OS X) with IMAP, POP3, SMTP, and NNTP support, SSL, flexible address database, Python scripting, powerful filtering, and many other features for advanced users.
    1.0 out of 5 stars 2 Reviews
    Downloads: 2 This Week
    Last Update:
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  • 17
    jwma (java webmail app) uses jakarta mail (formerly javamail) to provide access to an imap email store. Multiple users can authenticate, read, send and manipulate email storage and persist a list of contacts, email identities and their own individual preferences. It works with email stored in mbox or maildir format or stored in a derby database; it has been tested with dovecot.james and exim4. See http://jwma.sourceforge.net/ for further details.
    Downloads: 1 This Week
    Last Update:
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  • 18
    threadkey

    threadkey

    Add keyboard shortcuts to switch between different thread views

    Strike the 'T' key to sort messages by thread, strike the 'U' key to sort unthreaded again, just like the 'G' key switches to Grouped By Sort view.
    Downloads: 1 This Week
    Last Update:
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  • 19
    PyBiff

    PyBiff

    PyQt based email notification utility for the system tray

    PyBiff is an email notification utility for the system tray, periodically checking email accounts for new messages. The current status is indicated by the icon in the tray, and a custom command can be executed and a sound played when new mail arrives. Another custom action can be performed by clicking the icon. PyBiff is implemented in Python 3 using PyQt6. It supports POP3 and IMAP4 protocols with or without SSL. Besides showing an icon it provides status details in a tooltip, a control...
    Downloads: 1 This Week
    Last Update:
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  • 20
    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.
    5.0 out of 5 stars 2 Reviews
    Downloads: 1 This Week
    Last Update:
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  • 21
    Zimphony Webmail

    Zimphony Webmail

    Free white-label webmail and admin workspace for Zimbra deployment.

    Zimphony Webmail Free is now available for public/community distribution. Zimphony Webmail Free is a free white-label webmail and admin workspace layer for Zimbra deployments. It runs alongside an existing Zimbra mail backend and does not replace Zimbra. Zimbra remains the mail backbone, while Zimphony provides a branded customer-facing webmail/admin experience. Included in the Free package: - Mail UI - Contacts - Admin UI at /admin - 2FA support - Migration/import/export...
    3.0 out of 5 stars 1 Review
    Downloads: 1 This Week
    Last Update:
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  • 22
    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.
    4.0 out of 5 stars 5 Reviews
    Downloads: 0 This Week
    Last Update:
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  • 23
    exmh is a user interface to the MH (a.k.a. nmh) email system. It is extensible and its users have exploited this to integrate PGP, Glimpse, ispell, faces/picons, MIME, and much more.
    Downloads: 8 This Week
    Last Update:
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  • 24
    GoldBug - Encrypted Communications

    GoldBug - Encrypted Communications

    Chat Messenger. E-Mail-Client. Websearch. Filetransfer.

    GoldBug is a decentralized & secure communication suite that offers an integrated e-mail client, an instant messenger & a file transfer. Also included is an URL-RSS-DB & a p2p web search. Current vers. w/ McEliece Algorithm. GoldBug has been 2013 - 2023 ten years just another Graphical User Interface of the Spot-On Encryption Suite. Main GUI features: Minimal & colorful Interface with Tabs in the East. Microsoft & Qt MinGW deprecated Win32 & for Compiling: ●...
    Downloads: 5 This Week
    Last Update:
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  • 25
    MH-E is the Emacs interface to the MH mail system. It offers all the functionality of MH, the visual orientation and simplicity of use of a GUI, and full integration with Emacs, including thorough configuration and online help. Since MH-E 8.6 was released in 2016, its development migrated to the Emacs repository. Thus, if you install an Emacs package, or check out and compile the Emacs source, then you will be running the latest version of MH-E. Consequently, we will retire this site once...
    5.0 out of 5 stars 2 Reviews
    Downloads: 1 This Week
    Last Update:
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