BestRelational database software mac os x lion 10 7 5 11g63 11g63 upgrade to 10 8

HanDBase is a light and fast relational database manager for desktops, PDAs, and smartphones which offers data entry, searching, sorting, filtering, printing. Free to try DDH Software Mac OS X. RazorSQL is an SQL query tool, database browser, SQL editor, and database administration tool for Windows, macOS, Mac OS X, Linux, and Solaris. RazorSQL has been tested on over 40 databases, can connect to databases via either JDBC or ODBC, and includes support for the following databases.

Mac

Mac Os X Relational Database Software

Does anyone knows of efforts to port industry standard RDBMS to MacOS X, like IBM's DB2, Informix, Sybase et. al.? How hard are you willing to try to get at least one of them to join MacOS X?
I recon that Oracle is a little bit expensive, so DB2 is my favourite, being free for individuals and programmers.
It is embarassing to have Cocoa and WebObjects and having to resort to a Linux or NT box to have a database server that clients can really talk to. I know of some solutions, good ones, but are somewhat proprietary.
Cheers.
Luis Correia