H2 is a free and fast SQL database engine written in Java. Included are a JDBC and ODBC driver. Both disk based and in memory operation are supported. It can run in embedded and client / server mode. A web console application is included. Clustering is supported as well. It can run as a Java application or as a native executable.

HSQLDB is a relational database engine written in Java, with a JDBC driver, supporting a rich subset of ANSI-92 SQL. It offers a small (less than 160k), fast database engine which offers both in memory and disk based tables. Embedded and server modes are available. Additionally, it includes tools such as a minimal web server, in-memory query and management tools (can be run as applets) and a number of demonstration examples. The product is currently being used as a database and persistence engine in many Open Source Software projects and even in commercial projects and products. This product includes HypersonicSQL.

A tool that allows users to create dashboards using simple SQL query and helps the user to organize their frequently used SQL queries. InfoCaptor is a Rapid Development tool that helps you create, manage and publish Dashboards (“Views”). InfoCaptor Dashboards can display information from different Databases on the same page. These dash-boards allow for summarized (aggregated) view of information as well as detailed view that make up the summarized (aggregated) information. Each dashboard can have any number of SQL queries with parameters and connect to different database instance of your choice. You can define any number of Drills on any column. You can format the output data with a rich set of formatting options. You can export the formatted data to excel. Some of the free dashboards Database Object Browser DBA Dashboard System Administrator Dashboard Datawarehouse Dashboard

JCDatabase is an alternative to JDBC with the following advantages: (1) JCDatabase does not require you to run a database server or configure your system to provide access to a local database, (2) JCDatabase can be deployed either on a server for access by many users or as part of a traditional client-side application using direct file access and (3) JCDatabase has the actual database built into it, leveraging the standard Java file access methods.

JDataStore is a fast, versatile, all-Java database that allows developers to write powerful, scalable stand-alone, embedded, mobile and Web based applications. JDataStore is the database of choice for Oracle, DB2 and SQL Server developers when they have a project that requires a powerful but compact database that must run maintenance free in production environments where there is no dba or IT support. JDataStore is J2EE and SQL 92 compliant and it is so fast that it can make sluggish Java applications look good.

The JET Code Generator connects to any JDBC based database and exports the schema as an XML formatted file. The user is free to write/modify XSLTs to generate virtually any type of source code from the XML representing your database schema. Then generates code based on XSL Transformations. A complete example is included; with a database, support classes, XSL Transformations, build scripts (ANT, and batch).

Jisql is a Java based utility to provide a command line interactive session with a SQL server. This application is conceptually modeled on the Sybase 'isql' program with, obviously, strong similarities to Microsoft SQL/Server isql and osql.

JoraclePro™ is a powerful, 100% pure Java Oracle PL/SQL editing/debugging tool. Including PL/SQL syntax colorization, database objects browser, one-click PL/SQL programs(packages, procedures, functions) debugging/testing script generation, and a sqlplus console with saved PL/SQL history.

PKLite SQL Client is an Open Source Java program can connect to any JDBC compliant database. It has basic query and update functionality and some simple database information capabilities. The goal of this project was to create a lightweight SQL client (~ 1 MB) that was portable, easy to install and be vender independent. There are still some issues to be worked out so that is can be completely database vender independent but with this new build it is able to connect to any database that has a JDBC driver and run on any OS that has a Java VM.

SpeedJDB was developed for DBAs in order for them to get a uniform interface for all common databases. This has been achieved by using the JDBC (Java Database Connectivity) API that makes it possible to execute SQL selects against all databases that provide corresponding JDBC drivers, or that have drivers available for; these are nearly all database systems.