FlashStart - The FlashStart Cloud is a web filter for malware protections and to manage unwanted and offensive internet content.
Whoisology - Connected database of whois records and whois history
OpenDNS Umbrella - Cloud Security
WhoisThisDomain - Domain name lookup tool that allows you to get information about domain registration from WHOIS server.
Threat Insight - Browse Threat Insight information, resources, news, and blog posts. Gain the insights you need to prevent cybersecurity threats and protect your organization.
JSON WHOIS API - Parsed domain WHOIS data from any WHOIS server via RESTful API with metered pay as you pricing.