Stridekick - Join friends and take strides towards achieving better health.
BuiltWith - Find out the technology behind websites
Azumio - Azumio is a mobile health company that specializes in mobile biometric technology, which is designed to track your health status and provide daily, weekly, or monthly basis reports related to workouts in the form of graphs or charts.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
inKin Social Fitness Platform - Compete with friends via various fitness trackers & apps
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.