En Mashable podemos encontrar un impresionante listado con cerca de 500 aplicaciones gratuitas de Código Abierto.
Os extraigo las que se refieren a Diseño Gráfico y 3D:
Ajax Image Editor – Open source image editor using PHP.
ArgoUML – ArgoUML is a popular open source UML modeling tool compatible with any Java platform.
Avidemux – A simple video editor with support for DVD/DivX conversion and editing.
Blender – 3D animation and modeling suite with various tools for modeling.
Bluefish – A powerful editor for programmers and web designers enabling them to write websites, scripts and programming code.
BRL-CAD – An open source CAD system centered on constructive solid geometry (CSG) modelling.
Cinelerra – A professional open source video editing tool with features for capturing, editing and compositing.
CinePaint – Professional graphical editing application targeted towards the movie industry.
Cornice – Cross platform image viewer initially developed for Linux; similar in functionality to ACDSee.
Dia – Open source drawing tool for UML diagrams, similar in functionality to «˜Visio»™.
Flowchart Studio – Allows the user to draw a flowchart through graphical editor.
F-Spot – A feature rich personal photo management application for GNOME desktops.
Gaphor – Simple modeling environment that enables users to create intuitive UML diagrams for documentation purposes.
Gimp – The oldest, and most famous, open source graphic application with over 100 plug-ins and powerful paint tools.
Gimpshop – Gimpshop changes menus and dialogs in a manner similar to its competitor, Photoshop.
GQview – A lightweight image viewer with easy navigation, zoom and thumbnail preview features.
i.Mage – i.Mage is a handy graphics editor featuring easy pixel & image editing.
ImageMagick – Allows for the creation, editing and composition of bitmap images.
imgSeek – imgSeek is a photo management and viewing application with search support.
Imgv – An open source, feature rich image viewer providing support for a variety of image formats.
Inkscape – An open source vector graphics editor similar in functionality to Illustrator. It provides support for all drawing features like any commercial product.
Inquisitor – A fast visual web picture ripper, downloader and offline browser.
Jahshaka – Powerful open source movie editor with real time media playback and visual effects.
Karbon – Part of the open source KOffice suite, makes a great choice as a vector drawing application.
Kino – An open source non-linear video editor that comes with easy importing of DV video and provides video and audio transition effects.
khtml2png – A command line utility for creating PNG and JPEG images out of web pages.
Krita – An open source image editing and painting program with advanced features.
KToon – 2D animation toolkit with focus towards animation industry.
NVU – A complete cross platform web authoring system which makes it very simple to create web pages and manage a website without any technical expertise.
OpenLaszlo – An excellent development environment for web applications as it can generate Macromedia and AJAX files for webpage use.
Paint.NET – .NET based open source bitmap application with an intuitive user interface for drawing and editing.
Page Scavenger – A simple Windows application useful for downloading images from free hosting services via webpage links.
Pixie – Open source RenderMan renderer.
Potrace – An open source project useful for converting bitmap images to raster or vector drawings.
QCad Community Edition – A simple, easy to use open source 2D CAD application.
Quanta Plus – A feature rich web development environment.
Seashore – A basic open source image editor with simple functionality and features.
Scribus – Open source cross-platform desktop publishing application. (Como InDesign)
Skencil – A flexible open source, interactive vector drawing application for illustrations, diagrams and other purposes.
Synfig – An open source 2d vector animation program for artists to assist them with making cartoons.
UFRaw – Unidentified Flying Raw is an open source photo converter that can be used as a standalone application or as a plug-in.
VirtualDub – An open source video capture and processing utility with basic features.
Violet – Violet is an easy to learn and use open source UML editor.
Xara Xtreme – Powerful, general purpose graphics application for Linux and other UNIX platforms.