mtPaint is a simple GTK+1/2 painting program designed for creating icons and pixel-based artwork. It can edit indexed palette or 24 bit RGB images and offers basic painting and palette manipulation tools. Its main file format is PNG, although it can also handle JPEG, GIF, TIFF, BMP, TGA, XPM, and XBM files.
aubio is a library for audio labelling. Features include onset detection, silence detection, beat tracking, and pitch detection. The goal of this project is to provide automatic labelling features to other audio software projects. Functions can be used offline in sound editors and software samplers, or online in audio effects and virtual instruments.
SndBite is a specialized audio editor designed for breaking large recordings into smaller components with great efficiency. Its principal intended application is in linguistic research where it is often desirable to put each word or sentence into a separate file before further processing. It is also useful for measuring pause durations. Its features include multiple simultaneous views of the waveform at different resolutions, the ability to position window edges at transitions between sound and silence, automated setting of cut points at zero-crossings, automatic filename generation easily controlled by the user, and optional automatic playback on window motion. It is scriptable and may be run in batch mode without the GUI.
GTKRawGallery is a workflow-oriented photo retouching program with the necessary tools to quickly process camera raw images. It brings together Dcraw, Imagemagick, and Exiftool. Important features include an image browser and manager for popular formats, a full-featured Dcraw GUI for fine-tuned raw image pre-processing, image modification tools for 16-bit/channel post-processing, batch conversion with single workflow applicable, a batch processor to speed up the workflow, fast tagging, an advanced metadata editor with EXIF, IPTC, and XMP write support, color management, and print support, Facebook, Flickr, and Picasa Web Albums publishers, and a Dropbox uploader.
Fotoxx navigates an image collection using a thumbnail browser to choose images to view or edit. Edit functions include brightness, contrast, color, gamma, white balance, tone mapping, red eyes, sharpen, blur, noise suppression, smart erase, trim (crop), resize, rotate, add text, bend/warp, many art effects, HDR, HDF, stack, and panorama. Edit functions use movable curves and sliders. Feedback is live using the whole image. RAW files can be edited and saved with deep color. Areas or objects can be selected using freehand draw, follow edge, and tone matching. Selections can be edited in place with adjustable blending. They can also be cut and pasted into other images. Any metadata can be edited, reported, and searched (filenames, tags, dates, geotags, comments, captions, ratings, etc.). Collections (arbitrary subsets) can be defined and viewed. Batch functions are available for rename, resize/export, RAW conversion, and more.
Twibright Syntring is a purely algorithmic string synthesizer with ASCII tab input and wav output. It doesn't use any samples, yet sounds quite realistic. Timbre, volume, and timing are adjustable in the tab file. It can be used for learning or practicing guitar or bass playing, for editing and synthesizing one's own tunes, or producing MIDI sound fonts. It is very lightweight and portable, and doesn't require any libraries.