Send Love, Send Letters (at cost)
No signup required for one-off mailings, but Lob's API already handles this at scale.

No-account mailing for $1.60 beats Lob's enterprise complexity for individuals.
Remote workers, digital nomads, and individuals needing occasional physical mail
Lob · Click2Mail · USPS Click-N-Ship
No signup required for one-off mailings, but Lob's API already handles this at scale.
Ship code that prints and mails real postcards — Lob does this but less playfully.
Turns AI prompts into physical vinyl stickers shipped to your door, no design skills needed.
Zero third-party email service, fuzzy variable mapping, preview-before-send, but Zapier+SendGrid solves this.
This shaves a boring but real pain down to a tiny, usable tool: pick an envelope size, type addresses, preview, and export a PDF tuned for common printers. Generating USPS Intelligent Mail barcodes locally and keeping everything client-side is a clever, privacy-friendly touch. It feels aimed at practicality rather than novelty—would love CSV/address-book import and clearer mobile support to make it indispensable.
Text-to-3D manufacturing with delivery in days, but pricing and reliability unconfirmed.