ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.
Referrer Spam Remover - Remove spam bots from your Google Analytics data
ipapi - Web analytics with IP address lookup and location API
Spam Check - A free JSON API to check your email messages' spam scores
ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database
CanIPhish - Blend social engineering with real-world phishing simulations to train your users how to detect the most advanced threats.All in a completely self-service, fast, free and modern SaaS platform.