CaptionBot by Microsoft - Analyzing and describing images by a bot
WordItOut - WordItOut is the word cloud generator that gives you control with many custom settings.
WTF is that? - Send any picture and it will tell you what it is!
Wordsalad - Wordsalad is an app for generating “word clouds” from text that you provide.
Instagram Caption Writer - Write nice formatted Instagram captions.
TagCrowd - Create your own tag cloud from any text to visualize word frequency.