Welcome! Good to have you with us. I have a Droid and once I mounted/connected my phone to my computer I was able to drag individual songs an playlist from iTunes to the music folder on my SD card which I created.
I have MixZing myself and I enjoy it a lot personally but I have heard good reviews on PowerAmp music player also. Just have to give them both out a try with the free version and see which one suits you and your listening needs best