nano.to
API to create hosted payment links for your nano address. Accessible from any internet connected device with a modern web browser.
Anonymous, no account or API key required to use.
Coinify
A REST API with PHP and Python SDKs for Nano payment processing available to Coinify partners
Accept Nano
Accept Nano is a self-hosted payment gateway with a Go-based server and Javascript client.
Nandro
Open source point of sale with NFC support.
HectorChu Github
HectorChu has created several useful tools for managing nano transactions.