iotlist - Discover the internet of things
Schema API - Extract structured content from the semantic web
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
APIsentris - Build APIs instantly from MySQL, PostgreSQL, Google BigQuery and more
Fieldbook - Create a database, as easily as a spreadsheet
Schema - Organize, share and learn by adding structure to knowledge 🤓