HSHTG - Generate, manage, save and edit hashtags just in a few finger tap
YouDict - YouTube dictionary to search words, expressions & names
hashtags.org - Hashtag is an extensive hashtag research platform for analytics and tracking of hashtags, providing...
vdNote - Share noteworthy moments from YouTube videos.
HashtagWiki.com - Hashtag Generator Tool
you-tldr - Get the tldr of any YouTube video in seconds