The purpose of ODBCTrace is to trace calls into the ODBC API on a Win32 machine, while offering a reasonable user interface and more elaborated options than the odbctrac.dll shipped by Microsoft®.
NDB/J is a Direct Java API for storing and retrieving data from MySQL Cluster's NDB storage engine, without using the MySQL server. NDB/J has compiles on MySQL Cluster 5.0.x (tested on 5.0.37) and 5.1.16 and above.
jDB is a small, lightweight, easily embeddable into other applications database system that has a console frontend to use to manage your own personal data, and a CGI frontend to administer and use remote databases through the web.