vdNote - Share noteworthy moments from YouTube videos.
hashtags.org - Hashtag is an extensive hashtag research platform for analytics and tracking of hashtags, providing...
YouDict - YouTube dictionary to search words, expressions & names
HSHTG - Generate, manage, save and edit hashtags just in a few finger tap
Summary Panda - Remove annoying 'blah blah blah' parts of YouTube videos.
RiteBoost - Auto-hashtags, Auto-emojis, GIFs and much, much more, all according to your Enahce rules.