A complete one is "Airports"
It gives airports data, atis, rwy size, taf/metar, notam, international volmets, tools including snotam decoder, rwy state decoder, wind comp, approach angle and you can add notes to your favorite airport like webcam links and so on.
These for 2.5 €
"PToolbox" is nice for deicing holdover time.
"jet Fueling" to compute your... petrol of course
job for dummies...
Happy Landings