My Linux box (RH 7.3) came with MySQL and Postgres. I used the MySQL mainly as backend for Everything2 and MovableType, and the Postgres just for goofing around. (Well, I used E2 and MT just for goofing around also.)
Around March of this year I got DB2 UDB from the IBM web site and brought it up. I used DB2 MVS mumble years ago and thought it was pretty nice, so I wanted to see what this version was like. I've been told UDB is a totally different code line than the old MVS version. Still, pretty nice. I'm surprised it's not more popular.
Earlier this month it became clear at my client that I'd have to develop some pieces on Oracle, which I'd never used seriously. So I went to Oracle and downloaded 9i to see if it came with any good documentation. It didn't, but I figured I'd install it just for grins -- though I only got halfway through. That thing's complicated and the online docs are pretty meager.
Monday I decided to start work on re-writing some Sybase scripts so I could contribute them to a Sybase DBA collection that someone I met through Perlmonks is putting together. I realized I'd need a Sybase installation to test against, so I went to the Sybase web site, and lo and behold, you can get ASE 11.9.2 for Linux for development use. So I grabbed it and brought it up last night. (Having done some DBA work in the past helped....)
So have I missed anything?? Is there any Unix-compatible database out there that I don't have? (I used to have MS SQL Server when I had a Win2k box -- before the hard disk started going and I decided to leave the dual-boot world.)