This is a english based query tool. This was worked on for about 5 years before being abandoned in about 1999. The company that I work for agreed to open source the code.
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...Make web site development with database interaction easier with automated JSP taglibs that allow you to modify your JPA entities through a web page with a few lines of code.
XDataServer - is a Object Oriented Database engine, which relies on XML, XSL and XSD techonologies. It uses native data types, native storage and native code for perfomance in work with XML data types.
Library that handles persisting plain .NET objects to and from an underlying relational database. Using attributes in your source code, you define validation and other behaviour.
Supports hineritance, aggregation and persistant events.
...Connects to several live databases (including Postgres, MySQL, Sybase and MS SQL Server) and uploads and downloads schemas. Generates and parses SQL and generates Java source code from the schema.
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UPDATE 10Jun12:
I have not had chance to package up the source code for this - however - it is all written. There's a full write up/article detailing exactly what I did/how it works here:
PHP MySQL "instant" Audit Trail:
http://www.flatcoder.co.uk/php-mysql-instant-auditorauditing/
This came about when a client asked for a way to audit their system. The codebase was an old PHP application with more files/scripts that anyone would like to plough through!
NecJGui is an antennas design tool, interface for Numerical Electromagnetic Code. It allows easily making NEC input files, and viewing them in 3D. It also contains a version of the simulator, so it's complete IDE for full-wave EM simulation.