While it's mainly a video editor, its keyframe animation ... Fusion is hands down one of the best free motion graphics tools available, and I highly recommend checking it out.

As with many great video-editing tools ... Blender is the best free motion graphics tool, whether or not you use it for 3D ...

There are two ways to create a time-lapse motion graphics video ... that you install the Xvid video codec prior to installing SkyStudioPro. Read: Free video surveillance software for Windows.