mandriller by dtaniwaki

Validate email for common typos and one-time email providers. Maintained by maximeg on GitHub, where it has earned 257 stars from the community.

Notifications for Ruby on Rails applications. Maintained by excid3 on GitHub, where it has earned 2,699 stars from the community.

A modern modular service object toolkit for Rails, that respects database transactions and adds type checks to returned values. Maintained by DmitryTsepelev on GitHub, where it has earned 80 stars from the community.