* [Nodemailer v9.0.6](https://github.com/nodemailer/nodemailer) – Email sending library for Node.js.

* [goeland v0.28.0](https://github.com/slurdge/goeland) – Go-based RSS-to-email tool with multiple filters and digest support.

* [Mail2Go 1.2.0](https://github.com/KeepSec-Technologies/Mail2Go) – Lightweight Go-based command-line SMTP client for sending emails with configurable server settings, TLS options, recipients, body content, and attachments.