XML-DBMS (Perl) is a port of the Java version of XML-DBMS. XML-DBMS is middleware for transferring data between XML documents and relational databases. It views the XML document as a tree of data-specific objects in which element types are generally viewed as classes and attributes and PCDATA as properties of those classes. It then uses an object-relational mapping to map these objects to the database. An XML-based mapping language is used to define the view and map it to the database.
DBHawk is a Web-based Oracle tool that provides convenient database administration and development from home, office, or remote locations. It allows developers and DBAs to do various database tasks such as browse database objects, create new objects, view dependencies between various objects, generate DDL, execute SQL queries, run Explain Plan, and export results into HTML, CSV, or PDF format. It features storage management, security management, and the ability to monitor sessions, view/modify database parameters, browse v$views, etc. It is easy to install and straightforward to use on Windows, Linux, and Unix platforms.
jpt is a generic database toolkit. The package's main component is the libjpt library, which can be easily linked into C++ and C programs. A jpt database consists of a single sparse table, with an arbitrary number of rows and columns. The programming interface is simple, and the data structures are designed for fast random inserts and lookups.
KWC (Key Width Calculator) calculates the bit count required to represent a specified number of combinations. It additionally calculates key width in platform bytes (C char type), actual number of combinations covered by that many bits, and the difference and ratio of requested and actual coverage.
Websqlbrowse is a web-based SQL database browser. Browses may be restricted and customized, and records may be added, edited, or deleted. Websqlbrowse currently works only with MySQL. While it is not currently in active development, it's still a fast, lightweight DB interface that is fairly easy to set up and is currently in use by quite a few people around the globe.
databeans is a fully object oriented (not relational) persistence framework for Java, based on the use of the JavaBeans accessor methods to read and write data on disk instead of in the classes' instance fields. It is distributed (through RMI), transactional (with the 4 ANSI isolation levels supported), garbage collected (backed by an on-disk heap called "heapspace"), and has persistent versions of the Collection classes. It aims to provide a full-fledged solution for enterprise application development.