Not only can you download from any of the Android app resources but Amazon has a free app of the day - some good and others not worth bothering with, but these are paid apps given for one day for free. Check them out each day.
I have two Samsung tablets. They work well but Samsung does not always provide updates when new Android versions come out. The new Galaxy Note 10.1 is also not hardware compatible with the older Galaxy Note 10.1 - new connectors, new peripheral devices, etc. Be careful with Samsung in this regard. Be happy with what it does when you get it and don't count on any updates.