Freeware with full source code!
The Open QBuilder (OQBuilder) is a simple "visual query builder". You can use OQBuilder in your Borland Delphi and Borland C++Builder applications to make easier SQL-code generation. OQBuilder allows you to easy work with local and server databases via BDE, ADO, IBO, IBX, DBX, FIBPlus, etc.
All versions of Open QBuilder are available as freeware with full source code and samples.
You can create new TOQBEngine-descendants to work with any DataSet-oriented sources (for example - OCI engine, etc.). If you create your own OQBEngineXXX - contact us to share them with Delphi and C++Builder developers community. We will place your engines on our web-page. Please, save the style of your engine-component's .dcr-icons and deploy your components as freeware with full source code.
OQBuilder allows you to save and load query models. OQBuilder query format looks like ".ini file" and defined (and may be customized by you) in methods procedure TQBForm.btnSaveClick (model saving) and procedure TQBForm.btnOpenClick (model loading).
The first limited public version of QBuidler for Delphi 12 was released in 1996.