Evernote's elephant logo is similar. Elephants, like Evernote's cloud notebook, never forget. A ghost, like Snapchat's "Ghostface Chillah" icon, disappears just like Snapchat's photo messages.

Its icon is just a purple box ... Navigation app Waze has a cutesy, confusing logo. Is it a car or a message bubble? Yahoo's redesign caused an uproar. It was called "ugly" and "boring" by ...