Mailivery - Reach the Inbox, not the spam folder.

Pennies - Incredibly simple personal budgeting app for iOS

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.

Rocket Money - Find your paid subscriptions and cancel with one click

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

Unspent - Track your spending money. Keep it simple.