I really love the Color Squares bot, created for IACD last year. An example tweet from this bot:
— Color Squares (@ColorSquares) February 27, 2015
The bot seems to create a collage based on a common English noun using images found (I think) online from googling the word. In this way, it calls to attention the different ways in which a word could potentially be interpreted and the most popular interpretations (according to the internet). It also produces beautiful, compelling images to look at and seems to be an interesting technical feat.