TweepsBook - A better bookmarking tool for power Twitter users that you can use to filter, organize and bookmark tweets on your liking.
Hypefury - No idea what to share on Twitter?
Tweetflick - Save, organize & find Tweets to get the most out of Twitter
Iceberger - Draw an iceberg and see how it will float
TWRL - It's like merging Instagram and Texting into one platform.
My Twitter Inspiration Handbook - The best brand tweets grouped into categories.