Whoisology - Connected database of whois records and whois history
History Search - History Search remembers what's on all those websites you visit so you can find them again.
WhoisThisDomain - Domain name lookup tool that allows you to get information about domain registration from WHOIS server.
You.com - You.com, the world's first open search engine platform that summarizes the web for users, with superior privacy choices, actionable results, extensible apps and personalization through preferred sources.
JSON WHOIS API - Parsed domain WHOIS data from any WHOIS server via RESTful API with metered pay as you pricing.
Podcast Search Engine - Find anything inside your favorite podcasts