Gepetto provides a framework to animate characters. It lets you record choreographies and build complex moves using elementary actions. Gepetto is fully graphical and offers real-time rendering of the animation, but there is an undelying textual language describing the moves which can be used directly.
Gfract is a GTK-based fractal program that implements the standard Mandelbrot and Julia sets. It features infinite image size with infinite anti-aliasing if you have the memory for it, Julia instant preview mode, user-specified coloring algorithms, and PNG support. For palette files it uses the same format as Fractint does, except that it supports arbitraly large palettes.