nuvo - Sick of handling messy data? Create the best possible file import experience for your end customers with just a few lines of code.
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.
csvbox - Spreadsheet importer for your web app, SaaS or API
Mailivery - Reach the Inbox, not the spam folder.
CSV Explorer - Explore Spreadsheets with Millions of Rows
Postal - Open source mail delivery platform, alternative to Mailgun or Sendgrid