BuiltWith - Find out the technology behind websites
SAS Data Quality - SAS Data Quality gives you a single interface to manage the entire data quality life cycle: profiling, standardizing, matching and monitoring.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
RingLead - RingLead offers a complete end-to-end suite of products to clean, protect, and enhance company and contact information.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.
Microsoft Data Quality Services - Data Quality