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.

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.

StarDict is a cross-platform international dictionary lookup program.

Main features:
* Glob-style pattern matching search
* Fuzzy search
* Working from system tray
* Scanning mouse selection and showing pop-up windows with translation of selected words
* Pronouncing of the translated words
* Plugins support
* ..and more

Krita is an application for working with raster images. It allows you to both create images from scratch and work with ready-made images. You can work from photos or scans, or start from scratch. Krita directly supports most graphics tablets.

Pencil2D It lets you create traditional hand-drawn animation (cartoon) using both bitmap and vector graphics.

The basic features of Pencil2D are:
+ layers support (separated layer for bitmap, vector and soud part)
+ bitmap drawing
+ vector drawing
+ sound support

Hugin is a convenient application that allows the user not only to automate the process of stitching photos, but also allows you to manually, flexibly set parameters.
✔mosaic assembly mode, which allows you to assemble panoramas from pictures taken from different angles;
✔creation of polygonal masks, with which you can exclude unnecessary objects from the final panorama;
✔visualization of the entire project in the hardware-accelerated preview dialog, with which you can quickly assess the quality of alignment of overlapping images relative to each other;
✔grouping pictures taken with exposure bracketing - previously, time was wasted on aligning them relative to each other, even when it came to pictures of static objects taken from a tripod

qCAD is a professional CAD system, similar to AutoCAD, designed for creating mechanical engineering drawings and architectural plans. You can create technical drawings such as building plans, interior plans, mechanical plans, or schematics.
You can also easily create and edit drawings with ISO templates and save files in DXF format. The DXF format is used by many CAD systems.

Scribus is an application for professional visual layout of printed documents (newspapers, magazines, brochures, literature, etc.) capable of creating high-quality pages for any purpose - be it replication for printing or electronic distribution.
Scribus supports all the features of professional publishing systems, such as extensive capabilities for layout and pre-press preparation of text, the CMYK color model, Spot Colors, the ICC color output management system, and the creation of PDF files.
This is similar to AdobeInDesign or QuarkXPress.

BRL-CAD is a powerful cross-platform Open Source combinatorial Constructive Solid Geometry (CSG) solid modeling system that includes interactive 3D solid geometry editing, high-performance ray-tracing support for rendering and geometric analysis, network-distributed framebuffer support, image and signal-processing tools, path-tracing and photon mapping support for realistic image synthesis, a system performance analysis benchmark suite, an embedded scripting interface, and libraries for robust high-performance geometric representation and analysis.

FreeCAD is an extensible CAD/CAM system that includes some key concepts such as macro recording, workspaces, the ability to run as a server, and dynamically loaded application extensions.

FreeCAD can import and display CAD models in IGES, STEP and BRep formats, as well as meshes in STL, BMS, AST and Wavefront OBJ formats.