Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Gopher - Better hotel deals automatically, every time + cash back
BuiltWith - Find out the technology behind websites
Hopper - Hopper is the #1 most downloaded travel app in North America! We aspire to be the world’s best — and most fun — place to book travel.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.
MakCorps - Hotel Price Comparison API