U++ is a cross-platform rapid application development environment in C++. Can work with GCC, Clang, MinGW and Visual C++ and contains a full-featured debugger.
Fast development comes from smart and aggressive use of C++, not fancy code generators. In this regard, U++ competes with popular scripting languages while retaining the runtime characteristics of C/C++.
The development environment includes BLITZ build technology for up to 4x faster C++ rebuilds, visual designers for U++ libraries, Topic++ for documenting code and creating rich text resources for applications (such as help and code documentation), and Assist++, a powerful C++ code analyzer , which provides features such as code completion, navigation, and transformation.

FlameRobin is a GUI tool for administering the Firebird database management system
Her goals:
- undemanding to resources (low memory consumption, fast operation)
- cross-platform (Linux, Windows for starters, support for other systems is planned)
- dependence only on other free software

Valentina Studio provides the ability to create, edit, SQL queries, import and administer popular databases: Valentina DB, MySQL, SQLite and Postgre SQL using the following tools:
- diagram and diagram editor
- data editor
- SQL editor
- administration, diagnostics, compression, cloning, database defragmentation
and much more.

Integrated development environment for the Python language. It includes a graphical debugger that supports interactive exploration while suspended and auto-stopping on critical exceptions.
Main features:
- Project Manager;
- Editor with syntax highlighting;
- Debugger, profiler;
- Run Python code with support for command line parameters;
- Unit testing;
- Console for output and task manager (self-renewing TODO sheet).

Scratch is a simple, interactive, collaborative software development environment for creating interactive stories, animations, games, music, and graphics—and publishing them on the Internet. Scratch is designed to help children (ages 8 and up) implement 21st century educational skills. As they create Scratch projects, children learn important math and computer concepts and gain a deeper understanding of the design process.

це програма, яка надає змішаний аудіо / MIDI-секвенсор (відтворення і запис), багатодоріжковий редактор, редагування музики з використанням як рояль н-рол і оцінка позначень, MIDI файл вводу-виводу, LilyPond і Csound файли експорту і т.д.

A MIDI file player/game that displays the musical notes AND teaches you how to play the piano.

PianoBooster is a fun way of playing along with a musical accompaniment and at the same time learning the basics of reading musical notation.
The difference between playing along to a CD or a standard MIDI file is that PianoBooster listens and reacts to what you are playing on a MIDI keyboard.

To run Piano Booster you need a MIDI Piano Keyboard and a MIDI interface for the PC. If you don't have a MIDI keyboard you can still try out PianoBooster, using the PC keyboard ('x' is middle C), but a MIDI piano is really recommended.

MuseScore is a WYSIWYG editor with the ability to quickly enter notes from both the computer keyboard and an external MIDI keyboard. Supports import and export of data in MIDI, MusicXML, LilyPond formats, as well as import of files in MusE, Capella and Band-in-a-Box formats. In addition, the program can export scores to PDF, SVG and PNG files, or to LilyPond documents for further fine-tuning of the score.

Shotcut supports many video, audio and image formats thanks to FFmpeg.
It uses a timeline for non-linear editing of multiple tracks, which can consist of different file formats.

FluidSynth is a real-time software synthesizer based on the SoundFont 2 specifications and has become widely used. FluidSynth itself does not have a graphical user interface, but thanks to its powerful API, several applications use it and it has even found its way into embedded systems and some mobile applications.

Qsynth - GUI for FluidSynth.