ExportData.io - Export Twitter data for your business needs.
Twitonomy - Twitter analytics and much more.
Followerwonk - Followerwonk by Moz is a Twitter analytics tool to help companies better understand their Twitter followers.
hashtags.org - Hashtag is an extensive hashtag research platform for analytics and tracking of hashtags, providing...
TweetFeast - Download Twitter followers to Excel, CSV, and JSON.
Hashtagify.me - Free hashtags search engine, with paid advanced analytics