GUI Builder is a drag and drop interface for creating WebElement User Interface (WUI) templates that can be used as the foundation of a responsive Wep app. It simplifies the process of designing applications, and encourages separation of the logic and view. It is part of the WebBot Web development framework, which makes it possible to build Web apps in a similar fashion to Qt/KDE apps.
RedQueryBuilder fills the gap between a hand coded "quick search" and a full blown query language. A typical use is in an intranet Web application where experienced users need a quick ad-hoc way to find particular data. This means they don't have to use report frameworks or ask a techie. To use it in your app, you just need to drop in the JS, feed it the metadata for your database, then handle the change events to get the SQL and argument values.
DVelum is a professional development platform which aims at automating routine development tasks and facilitates programming by means of a graphical interface. The platform simplifies and accelerates the development process and allows for concentrating directly on the business logic, aside from low-level problems. This is not another CMS or framework, it is a platform for the development of systems with a complex internal structure, such as eCommerce, CRM, WebScada, etc., while the development of simple sites with its help is as easy and pleasant.