Arturia have given a final called on their iSpark app (although that was nearly a day ago) so if you want to get it before it goes back up then grab iSpark at its launch price of $9.99 (£7.99) before it goes. I’ve just checked and it’s still at the launch price but that could change any time.
I’ve also checked Cubasis and it is is still half price at $24.99 (£18.99) but may go back to its normal price any day now. It could be today for all I know.
Also Viking Synth (Audio Unit synth from Blamsoft) is still at its launch price of $4.99 (£3.99).
Finally if you’re interested you might also want to check out the app sales page for a few other deals at the moment.