Google Chrome, Firefox, and Thunderbird extension that lets you write email in Markdown and render it before sending.
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Marketing skills for Claude Code and AI agents. CRO, copywriting, SEO, analytics, and growth engineering.
The open-source communication infrastructure for agents and products
Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc. 🔥💬
280+ free n8n automation templates — ready-to-use workflows for Gmail, Telegram, Slack, Discord, WhatsApp, Google Drive, Notion, OpenAI, and more. AI agents, RAG chatbots, email automation, social media, DevOps, and document processing. The largest open-source n8n template collection.
High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.
The classic email sending library for PHP
💌 Build and send emails using React
The batteries-included full-stack framework for the AI era. Develop JS/TS web apps (React, Node.js, and Prisma) using declarative code that abstracts away complex full-stack features like auth, background jobs, RPC, email sending, end-to-end type safety, single-command deployment, and more.
MJML: the only framework that makes responsive email easy
E-mails, subdomains and names Harvester - OSINT
:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.
✉️ Send e-mails with Node.JS – easy as cake!
Ajax for Node.js and browsers (JS HTTP client). Maintained for @forwardemail, @ladjs, @spamscanner, @breejs, @cabinjs, and @lassjs.
A 100% free modern JS SaaS boilerplate (React, NodeJS, Prisma). Full-featured: Auth (email, google, github, slack, MS), Email sending, Background jobs, Landing page, Payments (Stripe, Polar.sh), Shadcn UI, S3 file upload. AI-ready with tailored AGENTS.md, skills, and Claude Code plugin. One cmd deploy. Powered by Wasp full-stack framework.
BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXzBUhZr
holehe allows you to check if the mail is used on different sites like twitter, instagram and will retrieve information on sites with the forgotten password function.
Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.
Open source alternative to Auth0 / Firebase Auth / AWS Cognito
An all-in-one email service platform powered by Cloudflare | 基于 Cloudflare 的一站式邮箱服务平台 | Cloudflare Email 邮箱 Mail
🧑🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.
🕷 Super-agent driven library for testing node.js HTTP servers using a fluent API. Maintained for @forwardemail, @ladjs, @spamscanner, @breejs, @cabinjs, and @lassjs.
Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)
Server-side Swift: a map to Perfect's Swift 6 packages: HTTP server, databases, sessions, sign-in, email, FileMaker and more. PerfectLib is on the legacy branch.