Sidemail - The simplest way to send transactional emails. Sidemail makes sending transactional emails trivial, it's perfect for side projects, MVPs or the next big thing.
GiveThanksNow - Send thank you notes to COVID-19 frontline workers
Postal - Open source mail delivery platform, alternative to Mailgun or Sendgrid
NumWorks - The graphing calculator that makes learning math easier.
Mailook - Identify & fix your email deliverability issues for free 👀
Cent - A network for Universal Creative Income.