ISTM that much of your list is just websites, Memory Map runs on Windows Mobile (and runs a lot better; the £20 Iphone version is utterly crap), and there are countless E6B apps (FlightCalc being one of many).
The Iphone does make a slick web browser; perhaps the slickest (of that screen size) I have played with, despite the miniscule default font in Safari. This is relevant because (for me, doing radio nav) all the preflight stuff is done via websites, not with any software one can run on any compact device. OTOH if you were flying dead-rec then you might be using a wind calculator but those exist for every platform there is.