Twitch - Twitch is one of the most prominent streaming services around, serving as a platform primarily for video game and pop culture streamers.
BuiltWith - Find out the technology behind websites
Imgflip - Flip through memes, gifs, and other funny images.
Wappalyzer - Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
Reddit - Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.
What CMS - WhatCMS.org looks at a variety of factors within a webpage to determine what CMS a website is using.