SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
vdNote - Share noteworthy moments from YouTube videos.
Rank Tracker - Rank Tracker is an SEO tool for tracking and improving keyword rankings across multiple websites and search engines.
YouDict - YouTube dictionary to search words, expressions & names
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Summary Panda - Remove annoying 'blah blah blah' parts of YouTube videos.