* [Novu v3.14.0](https://github.com/novuhq/novu) – Unified API for sending notifications through multiple channels, including Inbox, Email, SMS, and Push.

* [Mailspring 1.19.0](https://github.com/Foundry376/Mailspring) – Beautiful, fast mail client for managing emails across multiple platforms.

* [Nodemailer v8.0.2](https://github.com/nodemailer/nodemailer) – Email sending library for Node.js.

* [Onetime Secret v0.24.0](https://github.com/onetimesecret/onetimesecret) – Securely share sensitive information through a single-use link that can be viewed only once.

* [useSend v1.9.0](https://github.com/usesend/useSend) – Email sending and management platform with dashboard, API, SMTP, and bulk campaign support.

* [Mailgun with Go v5.14.0](https://github.com/mailgun/mailgun-go) – Go library for interacting with the Mailgun API to send emails and manage events.

* [Matcha v0.25.0](https://github.com/floatpane/matcha) – Powerful terminal email client built with Go and Bubble Tea, supporting rich content, multiple accounts, and modern TUI features.

* [Mailtrap Node.js client v4.5.0](https://github.com/mailtrap/mailtrap-nodejs) – Node.js client for sending transactional and bulk emails with sandbox mode, attachments, and API token-based authentication.

* [@keyid/agent-kit v0.2.0](https://github.com/KeyID-AI/agent-kit) – MCP-based email toolset offering send, receive, reply, search, contacts, auto-reply, scheduling, and webhooks for AI agents.

* [React Email @react-email/body@0....](https://github.com/resend/react-email) – Collection of high-quality, unstyled React components for building responsive, consistent emails with dark mode support.

* [Inbox Zero - Your AI Email Assistant v2.29.1](https://github.com/elie222/inbox-zero) – AI email assistant that helps users manage their inbox efficiently.

* [go-premailer v1.32.0](https://github.com/vanng822/go-premailer) – Inlines CSS into HTML email for Go.

* [Tangerine v2.1.0](https://github.com/forwardemail/tangerine) – Node.js drop-in replacement for the dns resolver API that uses DNS-over-HTTPS with retries, timeouts, smart server rotation, AbortController support, and pluggable caching.

* [react-onesignal 3.5.0](https://github.com/OneSignal/react-onesignal) – OneSignal integration for React and other JavaScript front-ends.

* [Modoboa 2.7.2](https://github.com/modoboa/modoboa) – Mail hosting and management platform with a modern web user interface.

* [Forward Email v2.6.19](https://github.com/forwardemail/forwardemail.net) – Privacy-focused email service with forwarding, transactional, and newsletter sending features.

* [happyDeliver v1.2.0](https://github.com/happyDomain/happydeliver) – Self-hosted platform that analyzes test emails and generates detailed deliverability reports with scoring.

* [postal-mime v2.7.4](https://github.com/postalsys/postal-mime) – Email parsing library for browser and serverless environments producing structured email objects.

* [Tuta Mail tutanota-release-nex...](https://github.com/tutao/tutanota) – Secure email service with built-in end-to-end encryption for safe communication across devices.

* [Wavebox v10.146.26-stable](https://github.com/wavebox/waveboxapp) – Chromium-based browser optimized for productive web-app workflows with tab management, sleeping tabs, cookie containers, profiles, and split-screen.

* [Notifuse v27.2](https://github.com/Notifuse/notifuse) – Modern self-hosted emailing platform with visual email builder, campaign management, transactional API, and real-time analytics.

* [Kurrier v1.1.13](https://github.com/kurrier-org/kurrier) – Modern self-hosted webmail connecting IMAP, SMTP, SES, SendGrid, Mailgun and more into a unified, privacy-focused interface.

* [MJML v5.0.0-beta.2](https://github.com/mjmlio/mjml) – Markup language with semantic syntax and components for simplifying responsive email coding and generating responsive HTML.