Inkscape

Allows to add trivial <animate> tags to a SVG document. Embedded animations work for standalone SVG graphics. Some instructions are understood by the GIF interpolation in ★export_gif <https://inkscape.org/~culturaljuice/%E2%98%85export_gif> (which this was originally intended for).

Usually requires selecting one object, invoking the module in Extension➜Animation➜Animate-Yo, and selecting one of the tabs to inject an <animate*> tag. The [move] option additionally requires a selected path (second argument) for transitioning the main object on.

You can use Inkscapes´ XML editor (Ctrl+Shift+X) to expand the options (keyFrames also have partial support in export_gif now).