SocialPilot - SocialPilot is an app designed to help businesses and professionals with social media marketing.
BuiltWith - Find out the technology behind websites
Fomo - Fomo turns your site into the online equivalent of a busy store
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Buzzstream - Build Relationships. Build Buzz. Web-based software that helps the world’s best marketers promote their products, services and content.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.