The best Golf Game is Let's Golf from Gameloft, but you can only download from their website directly onto your Droid (so use wifi) and you can't redownload it if you switch phones or flash a new rom (they said you will in the future). They also have a diablo clone a God of War clone and some shooters.
Racing game is Asphault 5 or Raging Thunder 2. A good action rpg is Zenonia.
A good file browser is called Astro. All files downloaded will go to your sdcard/download folder. You can sync music by downloading Doubletwist from the market and the Desktop version or sync itunes directly with Easy Phone Tunes.