* [Email SDK @opencoredev/convex-...](https://github.com/opencoredev/email-sdk) – Lightweight TypeScript SDK for transactional email pipelines with adapter routing, retries, fallbacks, and observability.

* [Upyo 0.5.2](https://github.com/dahlia/upyo) – Cross-runtime library for sending email messages using SMTP and various providers.

* [free-email-domains v1.10.1](https://github.com/Kikobeats/free-email-domains) – Comprehensive list of free email domains.

* [Onetime Secret v0.26.9](https://github.com/onetimesecret/onetimesecret) – Securely share sensitive information through a single-use link that can be viewed only once.

* [Pelton v2026.4](https://github.com/TRC-Loop/Pelton) – Privacy-first, cross-platform email client that keeps data local, supports fast local search, and provides attachment preview and offline downloads.