Pinterest is the cheapest traffic left for affiliates and sellers. The catch: nobody has an hour per pin. URL2Pin fixes that. Paste one product URL and get a full batch of scroll-stopping pins — each with its own image, headline, description and angle — then schedule them to Pinterest in one click via the official API. One link in, a week of content out. Built for Amazon affiliates, Etsy and print-on-demand sellers, and bloggers who want traffic that still pays months from now.

EmailEngine is a self-hosted email API. It connects to any email account over IMAP/SMTP, the Gmail API or Microsoft Graph and exposes all of them through one REST API, with real-time webhooks for new, changed and deleted messages, bounces and sent mail. Developers use it to sync their users' mailboxes into their own product and send email on the users' behalf, without writing IMAP, MIME or OAuth2 code themselves. Built by Postal Systems, the team behind Nodemailer.