MAC where are my Open Source at?

while i got used to debian's Synaptic, the APP Store on a mac is weird to me. NONE of the programs that i use on daily bases is on it:
VitrualBox
Keepass
truecrypt
pidgin

i mean .. wtf? these are important programs ... and like on windows i would need to keep track myself of all the updates or even worse .. have an update tracking program for each ... I loved the concept of Synaptic doing it all for me!

i guess developers would need for fork out $100 just to be an apple developer and then post it on the store .. for free & open source software thats steep price ...

so what do we have on the app store ... ohh GREAT Angry birds ... wtf?
I have mixed feeling about this!