DTM SQL editor
SQL editor with ODBC and IDAPI support, visual query builder, syntax highlighting, and search and replace capabilities.

Sysdeco Mimer AB
MIMER is a SQL based relational database management system (RDBMS) targeted at mission critical client/server environments.

CAST
Software for source code parsing, debugging, impact analysis, real time map building and evolution management for all client/server SQL based applications.

Data Transformations Inc.
SQL Query Tools available for download, and database consultation services.

PointBase, Inc.
100% pure Java database that allows one to manage one's data anywhere on the Net and scales from server to Internet appliance., requires no DBA, replicates with enterprise systems, supports standard SQL & Java objects, and is configurable as small as 100K.

SQL Report Builder
SQL Report Builder with end user report designer. Free Delphi components. By T Software.

YARD-SQL
SQL database system for UNIX from YARD Software GmbH.

DevGuru Intro to Microsoft JetSQL
40 page reference tutorial that explains and gives examples of code for Jet SQL clauses, declarations, expressions, functions, operators, and statements.

IBX Data Systems Ltd.
Creator of DBsurfer, an English query and decision support tool with a synthetic language interface that generates optimizable SQL for fast information retrieval.

Quadcap Software
The Quadcap Embeddable Database is a high performance pure Java database coupled with a JSP-enabled Web Server. QED supports Internet, intranet, and CDROM deployment of web applications.

red-gate.com
Supplies SQL Compare, a free application which allows you to compare the database structures of Microsoft SQL 7 and MSDE databases in a graphical user interface.

Frontline Software
FrontBase is a cross-platform SQL database with conformance to many international and de facto standards.

Daffodil DB
A embeddable, SQL-99 specification compatible, Java-based database engine. [Commercial]