Vidooly - Get deeper analytics of any YouTube channel or video
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
SimilarChannels - Find similar YouTube channels, discover new channels based on your interests, create your own YouTube collections with your favorite channels.
SimilarSites - Easily find more sites like those you like.
YouTube Trending - Making it easier to find viral videos
Product Hunt - A website that lets users share and discover new products