Look up country name and ISO code by IP v4 address
DuckDuckGo Zero-click Info includes topic summaries, categories, disambiguation, official sites, !bang redirects, definitions and more. You can use this API for many things, e.g. define people, places, things, words and concepts; provides direct links to other services (via !bang syntax); list related topics; and gives official sites when available.
Guess whether a first name is of male or female gender in the USA.
Generates dummy data for filling up databases, responsive web designs, or whatever else you need filler text for.