https://forminit.com/
Forminit (formerly Getform.io) - Headless Form Backend API
Headless form backend API that handles submissions, validation, file uploads, notifications, and webhooks. You build the frontend, Forminit handles the rest.
io headlessform backendapi
https://www.bryanleetc.com/posts/adding-sanity-io-headless-cms-to-eleventy/
Adding Sanity.io Headless CMS To Eleventy | Bryan Lee
A guide to integrating Sanity.io headless CMS with Eleventy, including setup, data retrieval, and rendering blog posts.
sanity ioheadless cmsadding
https://www.sticky.io/
Sticky.io | Headless CRM, Checkout, Payments Engine & Revenue Platform
Power your profits, scale revenue, connect with multiple payment providers, and keep chargebacks low leveraging Sticky.io's headless CRM and billing engine
io headlesspayments enginecrm