A free, open source, performance benchmark for private testing of relational database systems. Tests are written in the C language using GNU tools.

High-performance and compact DBMS server with support for SQL-92, ODBC, JDBC, UDBC, SAX, DOM, and XML.

Supplies application builders and developers with embedded database products (ODBC, SQL, client-server) with high performance, small footprint database engines.

Designs, develops, markets and supports a data storage and manipulation architecture, which allows ad hoc queries on data. Offices in the USA, Canada, the UK and Central Europe. (Nasdaq: SNDT)

Offers task scheduling tools for the major database servers.

Specializes in database applications including Full Convert and Sync Database. Based in Switzerland.

Offers forums for technical discussion, an integrated directory, white papers and daily news geared towards database professionals and users of database products.

Wisql, by Tom Poindexter, is an X11 version of isql (Windowing-ISQL) which gives you a SQL query editing window, a results window, and a lot of menus and buttons.

Object-relational cross-platform database engine by Paradigma Software.

Data manipulation and reporting software. Allows to view, edit, print, sort, filter, export, import, convert, search, replace the data.