Postal - Open source mail delivery platform, alternative to Mailgun or Sendgrid

GiveThanksNow - Send thank you notes to COVID-19 frontline workers

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.

NumWorks - The graphing calculator that makes learning math easier.

PromoTab - This tiny tool uses a real Gmail account to check if your emails will land in the Primary inbox of a reader or if it's stuck in the promotions tab or SPAM folder.

Cent - A network for Universal Creative Income.