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Versão em Português)
I have a recent experience with the Firebird API and the DBX4 API for Delphi 2007, and I wroted a DBX4 Driver for Firebird Database. It supports all field types of this database.
I don't have solicitations for new features, so, I don't have a roadmap too. But I'm aware of requests for new features and bug fixes.
I will continue to provide the drivers as a freeware, without sources. If you need the source code or support for the drivers, please contact me. I need to continue maintaining the driver because I have applications in production using it.