Not everything: http://sketchup.google.com/ http://picasa.google.com/

Also add the linux version of Google Earth - it's a joke

Google Earth has always been a farm for practicing features in preparation for a move into Maps. Earth was never a respected product.

Earth has many features that Maps don't. When is the time you tried Earth? Viewing old imagery, the flightsim, more layers, it even has street view integration now.

Both of those were acquired from external groups and were written before Google had their hands on the source.