Haiku Deck, a free app for the iPad, should be clear. As founder Adam Tratt explained to me: “We wanted to make it impossible to create ugly [slides].”

The app, as its name suggests, is all about brevity, enabling users to make clean, concise slide shows–or decks–with a heavily streamlined feature set. Using it is fiendishly simple: You enter a few keywords of text onto a slide, and the app searches a database of over 35 million Creative Commons images that suit your subject