Falling leafs, snowflakes, flowers or wathever you want :). Demo video
And there is a Pro version of this plugin, with many additional features: – choose which object fall (custom and multiple icons allowed) – quantity of objet falling – speed of the object (can be random speed) – 3 possible trajectories – define on wich pages or custom urls the falling things appear – define on wich period the falling things appear – multiple profils (ie: one for summer and one for winter)
More informations and demos here