Beyond Pricing - Automatic Pricing for your Airbnb
BuiltWith - Find out the technology behind websites
Vistaar - Vistaar is an innovator of price and revenue management solutions. Vistaar’s pricing software enables companies to achieve pricing best practices through price analytics, price optimization, price list management, and deal management.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Skuuudle - Discover, match and monitor your eCommerce competitors.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.