WordNik apparently requires an API key: 
https://developer.wordnik.com/

http://ergast.com/mrd/https-support/

I'm adding the Enigma Public API as its free, open plus it allows developers to build applications that integrate with a very broad collection of public data.

https://github.com/Codeusa/Netflix-Roulette-API/issues/19

Fixer.io Github page has a deprecation warning "The old, deprecated Fixer API will be discontinued on June 1st, 2018".

Exchangeratesapi.io provides a compatible free service with HTTPS and CORS support and is also open source.

fixes issue #644

Changed value; `Unknown` -> `Yes`

Update details for TheSportsDB, The MealDB and TheCocktailDB to support SSL and CORS.

Also add a dedicated API landing page.

Add the internet archive API (link to docs) and include its own category, since it covers a many areas.

Fixed alphabetical order, renamed "The Cat API" to just "Cats", since "API" is not allowed in the name

+ random.cat
+ random.dog
+ thecatapi.com
+ randomfox.ca

This is something I wrote almost an year ago. It wraps around Instagram's public API and provides access to public posts programmatically in a CORS compliant fashion. This works really well for building instagram image galleries as it does not require registering an app with instagram. It also provides a one-click deploy with heroku which let's the users host a private instance of the API.

As of today no other solution provides such access to instagram.