Desktop Database Software
Access by Microsoft
Server-less relational database system for the desktop target. Model: Integrated frontend. Platform: Windows. Features: store, query, transactions, manage, print, script and program.
FileMaker by FileMaker
Server-less relational database system for the desktop target. Model: Integrated frontend. Platform: Apple, Windows. Features: store, query, manage, print, script(?) and program(?).
OpenBase v11, currently available for Mac OS X and Linux, announced for Windows (as of 2010).
SqlBase v11.6 by Unify.
Relational Database Servers
BDB / Berkeley DB by Sleepycat Software, now Oracle*
Server-less key-value-pair database system for high performance and business-critical data. Model: Library. Features: store, query.
Cubrid v3.1for Linux and Windows.
Interbase / Firebird*
side-projects: Fyracle, Yaffil
=> excellent article on the 'benefits' of mysql
Light-weight relational database system with partial procedure support. Model: Library.
Does not have strong typing, only suggestive typing for columns.
SQL Server by Microsoft*
DB-related Languages and Techniques
Elimination of Duplicate Rows in SQL Server
Nulls and Null-handling in different DBMS
Sample Datasets for Benchmarking and Testing by Baron Schwartz