Nacapi - Turn your JSON into a restful API
Search Console Data Exporter - Export 25,000 rows of query data from Google Search Console
JsonAPI - Application and Data, Languages & Frameworks, and Query Languages
Redash - Data visualization and collaboration tool.
ReqRes - A hosted REST-API ready to respond to your AJAX requests.
Mixpanel - Mixpanel is the most advanced analytics platform in the world for mobile & web.