I suggest you Lucas Chess, it has some good engines into, a training program system and things like that, it's very good!
I don't know any good db, but you can start from reading Logical Chess move by Move by chernev for annotated GM games, I also suggest you this youtube channel, he analyze some recent games http://www.youtube.com/user/TheDaviddol/videos... I know a good opening book, but i don't remember the name, i'm sorry :( but on Lucas Chess there is an opening book system.
Hi, I'm searching these things, can you suggest me:
-A good free engine
-A good GUI, with many functions
-A large DB, for searching and studying games and openings. It should contain lots of games, recent and old