Buffer for Instagram - Plan, track, and analyze your Instagram marketing
HSHTG - Generate, manage, save and edit hashtags just in a few finger tap
Tagsdock - Tag Instagram photos instantly from your iOS keyboard.
HashtagWiki.com - Hashtag Generator Tool
Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
Hashtagify.me - Free hashtags search engine, with paid advanced analytics