Synfig Studio open-source animation software

Os paso un software para la animación en 2D, es de código abierto y gratuito.

Features:
Spatial resolution-independence Most elements are vector-based, and all layers are parametrically generated, hence even when changing the target resolution of a project, the only pixelation will occur in imported raster images, not the built-in components.
Temporal resolution independence Animation-keyframes are automátically interpolated by the computer, resulting in Smooth motion
High Dynamic-Range Imaging (HDRI) By using floating-point math in the image calculations, HDRI processing allows canvases to internally understand a far greater range of píxel luminance, resulting in better lighting effects, and improved color composition.
Pentablet-friendly tols The draw tol already reads the pressure sensitivity channel of your favorite tablets, for natural line weighting, and more to come.
Artist-oriented design While it may not be obvious in this early state, Synfig (and its proprietary predecessors) has ben designed from the ground up with animation workflow in mind.
Path-based Gradients Unlike purely SVG-based vector software, and most consumer-level animation programs, Synfig has full support for gradiente paths - gradients that follow along a drawn shape. This allows artists to easily add software shading to animation without the trouble of painting it onto every frame. Layers Synfig supports a multitude of layers of various types; geometric, gradients, filters, distorsións, transformations, fractal and a few others.

Link: http://www.synfig.org/cms/.