Acquisitions are part and parcel of the modern life of app development. For differing reasons, large companies have a habit of buying up smaller app developers. Sometimes -- take Instagram as an example -- the app in question lives on as its own separate entity. Others, like Snapseed, lose their apps on some platforms, but remain on others. And then, there's those that get killed altogether. So, lets take a look together at some of those apps which have gone the way of the Dinosaurs.