I like Google Earth a lot, it's interesting. I also like to use Google's web translator too. The iGoogle page is nifty too. I can watch/listen to the news there through web streaming plus the live weather.
I don't like Picasa though. Nice concept but it liked to delete files once they were copied to Picasa.
They do have a thing where you can limit it's access to your drive but still, I didn't like how it deleted some files I had.