Our company uses Servoy for rapid application development. It is a 4GL environment, that can target web-applications running in Tomcat as well as Java applications, all from the same program.
While it is standards based, some aspects of the generated code are proprietary, which couples those applications to the Servoy environment and tools.
Is Servoy truly unique in terms of the feature set that it provides, or are there alternatives that provide similar feature set, but without the lockin?