Not sure what the drum app is, but there’s definitely iShred, Pianist, and Bassist I think.
http://static.evernote.com/noteit.js 
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Not sure what the drum app is, but there’s definitely iShred, Pianist, and Bassist I think.
http://static.evernote.com/noteit.js
the drum app looks like Drum Kit Lite
Seems to have done iShred a load of good as they've rocketed up the app charts and now they've put their app on sale too