Whole load of APIs
ProgrammableWeb API Directory
https://www.programmableweb.com/apis/directory
OpenSignal API
https://www.programmableweb.com/api/opensignal
Daily Inspirational Zen Quotes API
Quote Garden
https://pprathameshmore.github.io/QuoteGarden/
Random Quotes API
https://github.com/lukePeavey/quotable
Inspiration quotes
https://inspiration.goprogram.ai/docs/
Quotes and expressions
Inspiring expressions
https://github.com/fisenkodv/dictum
A collective list of free APIs