'Apps Mashing' or 'App Smashing' are two slightly banal terms that are nevertheless popular in the blogosphere; they describe the powerful practice of combining several apps in a sequence that ultimately results in a final artefact that is better than anything the kids would have done if they'd tried to stick with just one app.
Here's a great example from Leah's and Rob's classes in grade 3; apps mashed:
There were many more like this...