function: email
414 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| typpo/textbelt TextBelt Open Source is a REST API and Node.js/Express server that sends outgoing SMS for free using carrier-specific email-to-SMS gateways… | 32 | 3377 | maintenance |
| leemunroe/grunt-email-workflow A Grunt-based build workflow for designing and testing responsive HTML email templates using SCSS. It compiles SCSS to CSS, builds HTML ema… | 32 | 3035 | maintenance |
| flashmob/go-guerrilla Go-Guerrilla is a lightweight SMTP server daemon written in Go, designed for receiving large volumes of email quickly and efficiently. It c… | 23 | 2958 | maintenance |
| jordan-wright/email A Go library for composing and sending email over SMTP with a simple, human-friendly API. It supports text and HTML bodies, attachments, cu… | 23 | 2796 | maintenance |
| MailCore/mailcore2 MailCore 2 is a C++/Objective-C library providing a simple, asynchronous API for working with email protocols IMAP, POP, and SMTP. It inclu… | 66 | 2695 | maintenance |
| mangini/gdocs2md A Google Apps Script that converts a formatted Google Drive Document into Markdown, emailing the converted file with extracted images as at… | 32 | 2662 | maintenance |
| helpyio/helpy Helpy is an open source, self-hosted helpdesk and customer support platform built with Ruby on Rails. It combines support ticketing integra… | 23 | 2472 | maintenance |
| Baiyuetribe/kamiFaka kamiFaka is a self-hosted card-key (kami) vending system for selling virtual goods like activation codes, coupons, and invite codes, built … | 23 | 2316 | maintenance |
| sensepost/ruler Ruler is a Go-based command-line tool for interacting with and abusing Microsoft Exchange servers via MAPI/HTTP or RPC/HTTP. It enables off… | 23 | 2313 | maintenance |
| mscdex/node-imap node-imap is an IMAP client module for Node.js that lets applications connect to IMAP mail servers, list mailboxes, and fetch messages and … | 32 | 2224 | maintenance |
| emersion/hydroxide Hydroxide is a third-party, open-source ProtonMail bridge written in Go that translates standard protocols (IMAP, SMTP, CardDAV) into Proto… | 10 | 2176 | maintenance |
| Flolagale/mailin Mailin is an SMTP server that receives inbound emails, parses them, and posts them as JSON to a webhook URL of your choice. It also validat… | 23 | 1954 | maintenance |
| OfflineIMAP/offlineimap OfflineIMAP is a Python command-line tool that synchronizes IMAP mailboxes to local Maildir folders, enabling offline email reading and ind… | 23 | 1859 | maintenance |
| xuhuai66/used-book-pro A fully open-source WeChat mini-program for a campus second-hand book marketplace, built on WeChat cloud development (cloud functions and c… | 32 | 1819 | maintenance |
| chenjj/espoofer espoofer is a Python-based testing tool that crafts spoofed emails to bypass SPF, DKIM, and DMARC authentication, including forged DKIM sig… | 32 | 1745 | maintenance |
| nodemailer/mailparser An advanced email parser for Node.js that decodes MIME-formatted emails, handling everything as streams to parse very large messages with l… | 99 | 1672 | maintenance |
| g13nn/Email-Framework A responsive HTML email framework providing boilerplates, grid systems, components, and snippets for building HTML email templates. It supp… | 32 | 1669 | maintenance |
| mailgun/flanker Flanker is a Python library by Mailgun for parsing email addresses and MIME messages. It provides robust address parsing (single addresses … | 70 | 1650 | maintenance |
| mailboxer/mailboxer Mailboxer is a Ruby on Rails gem that adds a private messaging system to web applications. It supports multi-participant conversations, sys… | 23 | 1635 | maintenance |
| Sh4yy/cloudflare-email A Cloudflare Workers-based proxy server for sending free transactional emails via the MailChannels API. It exposes an authenticated HTTP en… | 54 | 1600 | maintenance |
| denghongcai/forsaken-mail Forsaken Mail is a self-hosted disposable email service that lets you receive emails at temporary addresses via a built-in SMTP server and … | 32 | 1554 | maintenance |
| Raikia/FiercePhish FiercePhish is a self-hosted PHP web application for managing full phishing engagements, including campaign tracking, scheduled email sendi… | 23 | 1437 | maintenance |
| hongyonghan/Docker_Microsoft365_E5_Renew_X A Dockerized deployment of Microsoft 365 E5 Renew X, a service that keeps Microsoft 365 Developer (E5) subscriptions active by periodically… | 32 | 1379 | maintenance |
| Mange/roadie A Ruby gem that makes HTML emails easier by inlining stylesheets into the markup and rewriting relative URLs to absolute ones. It handles e… | 75 | 1349 | maintenance |
| basecamp/mail_view MailView is a Ruby gem that lets Rails developers preview plain text and HTML email templates in a browser without actually sending mail. I… | 10 | 1321 | maintenance |
| muan/github-gmail A browser extension for Chrome and Firefox that adds keyboard shortcuts to Gmail for opening and muting GitHub notification emails. It stre… | 23 | 1267 | maintenance |
| beyondcode/laravel-mailbox A Laravel package that lets applications catch and react to incoming emails from services like Mailgun, SendGrid, and Postmark, or a local … | 71 | 1132 | maintenance |
| onevcat/Hedwig Hedwig is a Swift package providing high-level APIs for sending email through any SMTP server, supporting plain, SSL, and STARTTLS connecti… | 57 | 1123 | maintenance |
| peterbe/premailer A Python library that transforms HTML email markup by converting <style> blocks and external stylesheets into inline style attributes on ea… | 32 | 1083 | maintenance |
| trumail/trumail Trumail is a free, open-source email verification system written in Go that checks address deliverability via SMTP handshakes with mail ser… | 10 | 1052 | maintenance |
| Slicejack/bojler Bojler is an email framework for developing responsive, lightweight HTML email templates that render correctly across popular email clients… | 23 | 1050 | maintenance |
| timeoff-management/timeoff-management-application TimeOff.Management is a self-hostable web application for managing employee absences, leave requests, and PTO for small and medium business… | 23 | 1042 | maintenance |
| Nilhcem/FakeSMTP FakeSMTP is a free, cross-platform dummy SMTP server with a graphical interface, written in Java, that intercepts emails sent by applicatio… | 10 | 1007 | maintenance |
| thunderbird/thunderbird-ios Thunderbird for iOS is an open-source email client for iOS devices, developed from the ground up by the Thunderbird/Mozilla community. It i… | 66 | 1171 | experimental |
| vue-email/vue-email Vue Email is a library of unstyled Vue components and render utilities for building email templates with Vue 3 and TypeScript, inspired by … | 56 | 1087 | experimental |
| nylas/nylas-mail Nylas Mail (originally N1) was an open-source, extensible desktop email client built with Electron, React, and Flux, featuring a plugin arc… | 10 | 24734 | abandoned |
| swiftmailer/swiftmailer Swift Mailer is a component-based, object-oriented PHP library for composing and sending emails via SMTP or Sendmail, with MIME message bui… | 10 | 9432 | abandoned |
| ramboxapp/community-edition Rambox Community Edition is a free, open-source, cross-platform desktop app that combines common web messaging and email services (WhatsApp… | 10 | 6382 | abandoned |
| nylas/sync-engine The Nylas Sync Engine is an open-source email sync platform that exposes a RESTful API on top of IMAP/SMTP, letting applications read and s… | 10 | 3496 | abandoned |
| djyde/cusdis Cusdis is an open-source, lightweight (~5kb gzipped) and privacy-friendly embeddable comment system for small websites, designed as a Disqu… | 10 | 2782 | abandoned |
| formspree/formspree Formspree is a form-to-email backend service that lets static sites submit HTML forms by pointing the form action at a Formspree URL, with … | 10 | 2754 | abandoned |
| laudspeaker/laudspeaker Laudspeaker is an open-source customer engagement and product onboarding platform with a visual journey builder, user segmentation, and mul… | 64 | 2618 | abandoned |
| CrimsonForge-io/king-phisher King Phisher is a phishing campaign toolkit for testing and promoting user awareness by simulating real-world phishing attacks, with contro… | 66 | 2583 | abandoned |
| Thomas101/wmail WMail is a free, open-source Electron-based desktop client for Gmail and Google Inbox, supporting multiple accounts, desktop notifications,… | 10 | 2049 | abandoned |
| haskellcamargo/gemidao-do-zap A Node.js command-line application that places phone calls (or sends SMS) to a victim playing the Brazilian meme audio 'gemidão do Zap', op… | 23 | 1974 | abandoned |
| charlierguo/gmail A Python library providing a Pythonic interface to Gmail via IMAP, supporting searching, reading, sending, labeling, archiving, and deletin… | 32 | 1803 | abandoned |
| ProtonMail/proton-mail-android The official Proton Mail Android email client, an open-source app providing encrypted email access on Android. This repository has been arc… | 10 | 1731 | abandoned |
| symfony/swiftmailer-bundle A Symfony bundle integrating the Swiftmailer library for sending emails in Symfony applications. It is no longer maintained because Swiftma… | 10 | 1536 | abandoned |
| fossasia/fossasia-nodemailer A small Node.js server that sends emails via the nodemailer library, configured with a Gmail account. It exposes a web interface on localho… | 32 | 1535 | abandoned |
| skerkour/bloom Bloom is an open-source, privacy-focused productivity suite offering email inbox, calendar, files, and contacts as a self-hosted alternativ… | 73 | 1531 | abandoned |
| billzhong/inbox.py Inbox.py is a minimal asynchronous SMTP server library for Python that lets applications receive email with a simple decorator-based handle… | 32 | 1501 | abandoned |
| seven1m/onebody OneBody is an open-source, web-based member portal for churches built with Ruby on Rails and MySQL, offering social networking, email lists… | 10 | 1389 | abandoned |
| ivaldi/brimir Brimir is an open-source email helpdesk/ticketing system built with Ruby on Rails and Zurb Foundation that converts incoming support emails… | 10 | 1367 | abandoned |
| thoughtbot/griddler Griddler is a Rails engine that provides an HTTP endpoint for email delivery services (SendGrid, Cloudmailin, Postmark, Mandrill, Mailgun) … | 10 | 1359 | abandoned |
| zoonk/uneebee Uneebee is an open-source platform for creating interactive courses, similar to Duolingo, built with Elixir, Phoenix LiveView, Postgres, an… | 10 | 1346 | abandoned |
| hardware/mailserver A simple and full-featured mail server distributed as a set of Docker images, bundling Postfix, Dovecot, Rspamd, ClamAV, Sieve, Fetchmail, … | 10 | 1288 | abandoned |
| Zizaco/confide Confide is an authentication package for Laravel 4 that reduces repetitive work in user account management. It provides account creation, l… | 23 | 1180 | abandoned |
| khamidou/kite Kite is a self-hosted webmail client designed to look like Gmail, with an AngularJS frontend and a Python 2 backend, deployable on a single… | 10 | 1061 | abandoned |
| manzinello/mailgo A lightweight JavaScript library that transforms all mailto: and tel: links on a webpage into an accessible modal offering direct actions l… | 10 | 1023 | abandoned |
| hmailserver/hmailserver hMailServer is an open-source email server for Microsoft Windows providing SMTP, IMAP, and POP3 services. The project is no longer actively… | 86 | 1016 | abandoned |
| odysseus-dev/odysseus Odysseus is a self-hosted, privacy-first AI workspace that combines chat, autonomous agents, tools/MCP integration, model serving, and deep… | 58 | 86318 | active |
| Ruby on Rails Ruby on Rails is a full-stack MVC web application framework written in Ruby, bundling Active Record ORM, Action Pack routing/controllers, A… | 98 | 58720 | stable |
| Ghost Ghost is an open-source, headless Node.js CMS for professional publishing, supporting blogs, memberships, subscriptions, and newsletters. I… | 95 | 55065 | stable |
| huginn/huginn Huginn is a self-hosted system for building agents that perform automated tasks online, such as monitoring websites, watching Twitter, and … | 67 | 49857 | active |
| Discourse Discourse is a 100% open-source community discussion platform (forum software) built with Ruby on Rails and Ember.js, featuring built-in re… | 86 | 47735 | stable |
| fastapi/full-stack-fastapi-template A full-stack web application template combining a FastAPI backend with a React frontend, including SQLModel, PostgreSQL, JWT authentication… | 90 | 45181 | active |
| Nextcloud Nextcloud is a self-hosted, open-source content collaboration platform for storing, syncing, and sharing files, calendars, contacts, and co… | 94 | 36592 | stable |
| symfony/symfony Symfony is a full-stack PHP framework for building web and console applications, plus a set of reusable, decoupled PHP components used by p… | 95 | 31135 | stable |
| lenve/vhr vhr (微人事) is a full-stack, front-end/back-end separated human resources management system built with Spring Boot and Vue, covering employee… | 32 | 28078 | active |
| Zulip Zulip is an open-source team chat application with unique topic-based threading that combines the best of email and real-time chat. It incl… | 94 | 25774 | stable |
| wasp-lang/wasp Wasp is a batteries-included full-stack web framework for building JS/TS apps with React, Node.js, and Prisma, configured via a declarative… | 98 | 18711 | active |
| docusealco/docuseal DocuSeal is an open-source, self-hostable web application for creating, filling, and electronically signing PDF documents, positioned as a … | 91 | 18386 | active |
| rowboatlabs/rowboat Rowboat is an open-source desktop AI coworker that indexes your email, meetings, Slack, and conversations into a living backlinked knowledg… | 87 | 17417 | active |
| Apprise Apprise is a Python library and CLI tool that lets you send push notifications to 100+ popular services (Telegram, Discord, Slack, email, S… | 95 | 17181 | stable |
| elie222/inbox-zero Inbox Zero is an open-source AI email assistant web application that organizes your inbox, pre-drafts replies in your voice, blocks cold em… | 96 | 12091 | active |
| Mail-0/Zero Zero (Mail0) is an open-source, self-hostable email client that unifies multiple providers like Gmail and Outlook into one privacy-first in… | 49 | 10784 | active |
| frappe/frappe Frappe Framework is a batteries-included, low-code full-stack web application framework written in Python and JavaScript, built around meta… | 95 | 10643 | stable |
| pocoproject/poco POCO (Portable Components) is a collection of cross-platform C++ class libraries for building network- and internet-centric applications, c… | 90 | 9478 | stable |
| loco-rs/loco Loco is a batteries-included web framework for Rust, strongly inspired by Ruby on Rails and built on Axum and SeaORM. It bundles models, co… | 93 | 9101 | active |
| openclaw/gogcli gog is a single Go binary CLI that provides terminal access to Google Workspace services including Gmail, Calendar, Drive, Docs, Sheets, Sl… | 83 | 8330 | active |
| Cisco-Talos/clamav ClamAV is an open-source antivirus engine and toolkit for detecting trojans, viruses, malware, and other malicious threats. It includes a m… | 98 | 7176 | active |
| hexclave/hexclave Open-source user infrastructure platform handling authentication, teams, RBAC, payments, emails, and analytics for SaaS apps. Deployable as… | 88 | 6841 | active |
| humhub/humhub HumHub is an open-source (AGPLv3) enterprise social network and intranet collaboration platform written in PHP on the Yii2 framework. It of… | 95 | 6737 | stable |
| webhooksite/webhook.site Webhook.site is a tool that instantly generates unique URLs and email addresses to receive, inspect, and debug HTTP webhooks and requests i… | 65 | 6717 | active |
| lanyulei/ferry Ferry is an open-source ticketing and workflow engine built with Gin (Go) and Vue + Element UI. It supports configurable approval flows, te… | 38 | 6620 | active |
| filipedeschamps/tabnews.com.br TabNews is the open-source codebase of a Brazilian community website for programming and technology discussions, where users publish posts … | 77 | 6376 | active |
| al1abb/invoify Invoify is a free, web-based invoice generator built with Next.js, TypeScript, React, and shadcn/ui. Users fill in a form, pick from 13 tem… | 72 | 6345 | active |
| maildev/maildev MailDev is a local SMTP server with a modern web interface that catches all emails sent by your application during development, so nothing … | 86 | 6032 | active |
| redmine/redmine Redmine is a flexible, self-hosted project management web application written in Ruby on Rails. It provides issue tracking, wikis, forums, … | 77 | 6020 | stable |
| twisted/twisted Twisted is an event-driven networking engine and framework for Python, providing an asynchronous reactor plus implementations of many inter… | 82 | 5977 | stable |
| zammad/zammad Zammad is a web-based, open-source helpdesk and customer support/ticketing platform that unifies customer communication across channels lik… | 77 | 5869 | stable |
| aidlearning/AidLearning-FrameWork AidLux (originally AidLearning) is an AIoT development platform that runs a native Ubuntu Linux environment with GUI, deep learning tooling… | 70 | 5797 | active |
| haraka/Haraka Haraka is a fast, highly extensible, event-driven SMTP server written in Node.js with a modular plugin architecture. It is widely deployed … | 93 | 5613 | stable |
| umputun/remark42 Remark42 is a self-hosted, privacy-focused comment engine written in Go that can be embedded into blogs and articles. It supports social an… | 97 | 5591 | stable |
| ProtonMail/WebClients The official monorepo for Proton's web clients, including Proton Mail, Calendar, Drive, VPN, Pass, Wallet, and more. It is built with React… | 84 | 5562 | active |
| lizhipay/acg-faka A self-hosted PHP e-commerce application for selling digital goods and card keys (faka), with an anime/2D-culture themed storefront. It inc… | 99 | 5514 | active |
| digitallyinduced/ihp IHP is a batteries-included, type-safe full-stack web framework built on Haskell and Nix, featuring compile-checked HTML (HSX), typed SQL q… | 92 | 5342 | active |
| rememberber/WePush WePush is a focused bulk message-pushing tool supporting WeChat template/customer messages, SMS providers (Alibaba, Tencent, Huawei, Baidu,… | 99 | 4676 | active |
| hestiacp/hestiacp Hestia Control Panel is an open-source, lightweight web hosting control panel for Linux servers that provides a web and CLI interface for m… | 99 | 4483 | active |
| astriaai/headshots-starter An open-source Next.js starter kit that generates professional AI headshots from user-uploaded selfies using Astria.ai's fine-tuning and in… | 40 | 4463 | active |