Database?

Are there any free programs out there with which I could organize an opening tree, including database games and all?

I use Chess X for my own games. It does what I want but I haven't tried any others for comparison. If anyone knows better, lets hear it.

SCID is a terrific program that all chess players should use.  I own Chess Base 11, but have uninstalled it because I like SCID better.  Chess X doesn't really function as a database, it only manipulates PGN files.  Hopefully it continues to be developed towards that end, as that is its goal, but it doesn't look promising.

http://scid.sf.net

Thank you both very much for your suggestions! I'll look into SCID, and check out ChessX if SCID doesn't suit my liking.

So far, it looks promising! However, I can't figure out how to upload PGN's into the database, which poses a slight problem. 

1) create a new database where you will ultimately store your games

2) go to Tools-Import File of PGN games

all done.

Alternately, you can "open" a file of PGN games via File-Open.  This copies the games into a temporary database called the "Clipbase."  You can then Use the Database switcher window (Windows-Database Switcher, or Ctrl-D, or the first button on the toolbar that has a blue stripe on the top of the button) to drag the clipbase games to a new database you have created.

Awesome! Thanks so much. For any passersby taking a look at the thread, I think this program's worth a try! The only (nit-picky) problem I have with it is that the pieces sort of flash every time I alternate between moves, but that's just a small technical detail.

By the way, any suggestions for building up a database of games? The maker of the program recommends TWIC, but I'm just wondering if there are other sources I should take a look at as well.

For what it's worth, I recommend "Scid vs. PC" over Scid.

http://scidvspc.sourceforge.net/

Scid vs PC is a fork of Scid... many improvements/enhancements over Scid and it's still being worked on and developed.  Scid hasn't had any updates in awhile.

@ MJ4H

Can you expand on what you mean by "Chess X doesn't really function as a database." What functionality does SCID offer that Chess X doesn't? I'm getting an error when I try to install SCID, otherwise I would see for myself, and now I would like to know if it's worth the effort to figure out what is wrong.

EDIT: Nevermind, it wasn't so much effort to figure out what was wrong. 

SCID has a compact and fast database format.  Just as an example, in SCID I have a 2.5 million game database.  It takes about 4 seconds to load it in SCID and almost 3 minutes to load it if I just load the PGN file with the same group of games.  In the database format, manipulating, searching, etc. is all much faster, more powerful, and in general more efficient.

ChessX doesn't have a database format yet, though it is planned.  It just loads PGN files.  Useful, yes, but nothing compared to SCID.  And I agree with Ed, ScidvsPC is very good and more recently updated.  Some people have issues with the lack of docked windows in it as compared to SCID, so I frequently recommend people learn with SCID and then switch to ScidvsPC, but if you are ok with a bunch of floating windows, it's pretty awesome.

For some serious eye candy, check out the (only inspired by SCID, not related) project scidb sometime.  Has more potential than ChessX, further along, and still active.  No windows version yet, but he says coming soon!

http://scidb.sf.net

Thanks for the reply. That's great information.