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.

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.

qStopMotion - creating frame-by-frame animated films from images imported from a camera or computer.

The resulting animation can be exported to various video formats, such as mpeg or avi.

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.

Denemo is a program designed to prepare sheet music for further processing and publication using LilyPond.
This is not a WYSIWYG music editor; its task is to quickly type notes, without displaying them correctly. Almost all input functions are implemented using hot keys, which actually speeds up the typing process, according to the developers. Some keyboard commands are the same as the corresponding commands in the Lilypond syntax: for example, moving the cursor or note an octave up and down is done with the keys ' and, respectively, the beginning and end of a phrasing line - ( and ), etc. Command overrides are available, so the user can customize the environment completely for yourself.
Denemo has different operating modes: insertion modes (normal and classic, which differ in the order of keystrokes when entering notes) and editing. Also, any operation can be performed with the mouse and recognition of their recorded sound, giving musicians a more familiar input method.
By saving scores in the LilyPond format and further editing the resulting source file, you can improve the appearance. It is possible to export scores in ABC music notation format and create MIDI files.

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.

Kdenlive is a non-linear video editor that supports DV, HDV and many other formats.
Its main features:
✔guides and markers for organizing the editing table
✔copy and paste clips, effects and transitions
✔changes in real time
✔video capture via FireWire and Video4Linux
✔screen capture
✔export to any FFMPEG supported format

CodeLite is a powerful and lightweight IDE specializing in C, C++, PHP and Javascript.

Its features include:
* Generic support for compilers
* Built-in GDB support
* Database-based Code Completion mechanism
* Syntax highlighting for C/C++, Java, Perl, XML, Makefile, Lua, Diff files, PHP, JavaScript, Python, HTML, and ASP
* Text Folding
* doxygen comment generator.

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.