Albacross - The world's first free B2B Lead Generation Network. Albacross help companies master their B2B digital marketing with Lead Generation and targeted marketing
Whoisology - Connected database of whois records and whois history
WhatRuns - Extension that helps you identify technologies used on any website at the click of a button.
WhoisThisDomain - Domain name lookup tool that allows you to get information about domain registration from WHOIS server.
Apollo.io - Apollo’s predictive prospecting, sales engagement, and actionable analytics help the teams to reach its full revenue potential.
JSON WHOIS API - Parsed domain WHOIS data from any WHOIS server via RESTful API with metered pay as you pricing.