* [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.

* [Send mail GitHub Action v16](https://github.com/dawidd6/action-send-mail) – GitHub Action that sends emails to multiple recipients with plain/HTML/multipart bodies, attachments, Markdown-to-HTML conversion, and SMTP configuration.