Ultimate++

U++
U++
	TheIDE from 2010
Developer	U++ team
Release	2004; 22 years ago
Stable release	2026.1 / 4 April 2026; 6 months ago
Written in	C++
Operating system	Unix / Linux / FreeBSD (X11), Windows, Windows CE, MacOS
Platform	Cross-platform
Type	Application framework
License	BSD license
Website	www.ultimatepp.org
Repository	sourceforge.net/projects/upp/files/upp/ ;

U++, formally known as Ultimate++, is a rapid application development framework written in C++ that aims to reduce the code complexity of typical desktop applications by including all necessary toolkits into a single C++ framework. Programs created with U++ work on multiple operating systems and hardware architectures with performance without needing to write platform-specific code.

It has its own integrated development environment called TheIDE that is designed to handle all library features and plugins.

Features

Some key features includes

An IDE with a GUI designer
Extensive use of RAII and auto pointers-like mechanisms to avoid manual memory management and limit the use of pointers in the code
Can emulate native widgets look and feel. On X11 systems, Ultimate++ supports GTK+ widgets look and feel.
The standard distribution comes with U++ sources included.
Uses NTL as a template system instead of STL.
Supports databases, with libraries to connect with various database systems.
Designed for high-performance application use cases with a low memory footprint and efficient use of system resources.
Retains backward compatibility, allowing developers to upgrade to new versions of the framework without issues.
Provides support for Unicode to make applications in multiple languages.
Document editor, Debugger, auto completion and Icon Designer for making tool icons with less effort.
Possible to work with Android NDK and SDK
Web development and other features

Example applications using U++ are: