hashtags.org - Hashtag is an extensive hashtag research platform for analytics and tracking of hashtags, providing...
Twidy App - Tinder for Twitter - Tidy up and declutter your timeline
HSHTG - Generate, manage, save and edit hashtags just in a few finger tap
Shipstreams - A list of makers shipping live
RiteBoost - Auto-hashtags, Auto-emojis, GIFs and much, much more, all according to your Enahce rules.
Vanilla Timeline for Twitter - Browse Twitter without the some-user-liked tweet clutter.