SketchPort!

LibreCAD (originally QCad then CADuntu) is an open source 2D CAD application for Windows, Apple and Linux. It is based on Qt, which is a leading cross-platform application and UI development framework.

Clip Studio Paint, previously Manga Studio or ComicStudio in Japan, is a family of software applications for Mac OS X and Microsoft Windows used for the digital creation of comics and manga.

Corel Painter is a raster-based digital art application created to simulate as accurately as possible the appearance and behavior of traditional media associated with drawing, painting, and printmaking. It is intended to be used in real-time by professional digital artists as a functional creative tool.

Verve (Dictionary: Energy and enthusiasm in the expression of ideas, especially in artistic performance or composition...) is the result of a curious idea I had to try using the graphics hardware to run a fluid dynamics simulation. Despite some little flaws, as you may observe at faster motions, it works astonishingly well across rather large resolutions. This permits highly detailed simulations of all kinds of liquids, and it screamed to be used for painting.

GPS (aka Gimp Paint Studio) is a collection of brushes, patterns, color gradients, accompanying tool presets and dynamics. Tool presets are a simply saved tool options, highly useful feature of the GIMP.

Sketches is a perfect mix of beauty, simplicity and power, a truly unique combination you won't find anywhere else.

PixelStyle Photo Editor 3.5.1 for Mac is an all-in-one Photo Editor for Mac with a huge range of high-end filters: lighting, blurs, distortions, tilt-shift, shadows, glows... Available at http://www.effectmatrix.com/mac-appstore/mac-photo-editor-pixelstyle.htm

Free photo editor online, you can manipulate your image such as crop, resize, rotate, light adjustment, color adjustment and image filter.

ChibiPaint is an open source oekaki applet, a software that allows people to draw and paint online and share the result with other art enthusiasts. You can start using it right now on this website in the Oekaki Board section or download it and integrate it into your own website.Features highlights:

iScribble is an online art and drawing website where people from all over the world can work on a drawing at the same time. Our interactive canvases allow users to draw pictures using a mouse or graphic tablet. Finished drawings can be published to our gallery where they are commented and rated by the users in our community.iScribble is a great place for beginners to learn drawing but also features advanced drawing tools for more demanding users.

PixelStyle Photo Editor for Mac is FREE but full-blown Photo Editor for Mac.

RealWorld Photos is an image editor focused on photo retouching and batch image processing. It can be used to adjust exposition, remove red eyes or blemishes, modify shapes, enhance photos or apply watermarks in batch.