Mup produces very high quality PostScript printed music or a MIDI file from a text input file. It can handle almost any kind of music, instrumental or vocal, including tablature, shaped notes, guitar grids, alternate tunings, user-defined symbols, and much more. Mup has been under active development since 1992.
PPM is yet another Game Boy (Color) tile and map editor that uses GTK. It supports many export formats (raw binary, GBDK .c, ISAS .asm, TASM .asm, WLA .asm, and RGBDS .asm), and has different Game Boy Color color emulation modes. It can also import GBTD and GBMB (popular tile and map editors for Windows) files. All mouse buttons draw, and there are loads of keyboard shortcuts. It can also optionally emulate the Game Boy's display.
Virtual Sound provides unlimited effects and modulation for sophisticated audio generation, with unique instrument simulation capabilities to craft your own unique soundscapes. All effects are parametrized and their parameters may be controlled through the outputs of other effects, through samples, or through special modulators. Instrument simulation is based on recursively-linked filter networks. Actual instruments can also be simulated through the statistical learning library incorporated in VSound.
The Refocus Gimp plug-in can be used to sharpen out-of-focus images. It is intended to be used for scanned photos and slides. In many cases, it produces much better results than the sharpen or unsharp mask plugins. It features a preview that helps you to select the best parameters.
GraphicsMagick is a robust collection of tools and libraries which support reading, writing, and manipulating an image in over 90 major formats including popular formats like DPX, DICOM, BMP, GIF, JPEG, JPEG-2000, PDF, PNG, PNM, SVG, and TIFF. A high-quality 2D renderer is included, which provides a subset of SVG capabilities. C, C++, Perl, Tcl, and Ruby are supported. Originally based on ImageMagick, GraphicsMagick focuses on performance, minimizing bugs, and providing stable APIs and ABIs. It runs on all modern variants of Unix, Windows, and Mac OS X.
ID3 mass tagger is a portable command-line mass tagger for audio files. It is designed for non-interactively adding, removing, or updating meta-information in a number of files with a single command. It can generate tag fields from the filename and rename files using an intuitive syntax. It currently supports ID3 (1.1), Lyrics3 (2.0), and ID3v2 (2.0 and 3.0) tags.