U++ is a C++ cross-platform rapid application development framework focused on programmers productivity. It includes a set of libraries (GUI, SQL, etc..), and an integrated development environment.
Rapid development is achieved by the smart and aggressive use of C++ rather than through fancy code generators. In this respect, U++ competes with popular scripting languages while preserving C/C++ runtime characteristics.
The U++ integrated development environment, TheIDE, introduces modular concepts to C++ programming. It features BLITZ-build technology to speedup C++ rebuilds up to 4 times, Visual designers for U++ libraries, Topic++ system for documenting code and creating rich text resources for applications (like help and code documentation) and Assist++ - a powerful C++ code analyzer that provides features like code completion, navigation and transformation.
TheIDE can work with GCC, MinGW and Visual C++ 9.0 as contained in free Windows Vista SDK and contains a full featured debugger. TheIDE can also be used to develop non-U++ applications.
What you can get with the Ultimate++ download in plain English
Very effective C++ library for cross-platform development in source form.
A good integrated development environment, designed for developing large C++ applications.
[fleXive] is a JavaEE 5 open source (LGPL 2.1 or higher) framework for the development of complex and evolving (web-)applications. It speeds up development by easing many tedious and repetitive programming tasks and helping to keep your application(s) flexible during the development-cycle and in production.
Based on the latest industry-standards like EJB 3, JSF, etc. [fleXive] should be your choice for building up your own new application.
Hm. RAD environment with Swing GUI, no downloads yet (2008-08-18), uses an proprietary scripting language, only the Enterprise Edition (2.2 K $) allows to use the Java API. Targeted customer group seems to be procedural developers. What sort of Java product should that be where you need to mention that you can write your own classes??? doesn't seem to use the Java EE API, would be interesting if the "ObjectScript" is interpreted or bytecode.
IMHO too proprietary, goes into the wrong direction for bigger enterprises.
10gen is a new platform-as-a-service technology designed to help developers quickly and easily build dynamic, scalable, mission critical web sites and applications.
The 10gen software stack is analogous to Google App Engine in that it provides a new stack of tools (database, grid management, application server) that are purpose-built to run in a cloud environment.
LIMBAS is a web client/server application allowing you to develop application quickly without programming. This, only by the use of tables and forms and other modules like workflow engine, user management, report editor, file manager or soap interface.
An outstanding feature is complete use with an Internet-Browser without installations, Plugins or other components on the client.