CaptionBot by Microsoft - Analyzing and describing images by a bot
TypeSlab - Simple, shareable typographic posters
Instagram Caption Writer - Write nice formatted Instagram captions.
Typorama - Typorama: Text on Photo Editor is a Typography Art and Poster Maker application created and published by Apperto Ltd.
WTF is that? - Send any picture and it will tell you what it is!
Redact Photo - Redact.photo offers free and private censoring of images in the browser.