Products from apilayer
REST Countries - link
weatherstack - real-time weather data - link
Fixer - foreign exchange rates (historical) - link
~ ~ ~
Typicode "users" - link
Random user - link
Worldometers - population data - link
The Cat API - link
PlaceKitten - images - link
REQ | RES - reqres.in
Enables GET, POST, PUT, DELETE (but no permanent persistence)
USDA FoodData Central
The 2019 Fall term iOS dev Assignment 4 used this service
Supports GET (to fetch an item) and POST (for general querying)