Famous First Websites - Discover what popular startup websites looked like at launch
SimilarChannels - Find similar YouTube channels, discover new channels based on your interests, create your own YouTube collections with your favorite channels.
Channel Meter - Smarter YouTube Analytics
YouTube Trending - Making it easier to find viral videos
Waybackpack - Download the entire Wayback Machine archive for a given URL
Vidooly - Get deeper analytics of any YouTube channel or video