RiteTag - No idea which hashtags to use? Get instant hashtag suggestions for images and texts on desktop and mobile.
hashtags.org - Hashtag is an extensive hashtag research platform for analytics and tracking of hashtags, providing...
Tagsdock - Tag Instagram photos instantly from your iOS keyboard.
Hashtagify.me - Free hashtags search engine, with paid advanced analytics
Hashtag Suggestions for Instagram - Find the best hashtags for every photo
HSHTG - Generate, manage, save and edit hashtags just in a few finger tap