RANDOM USER PROJECTS
Disney Pinball: real physics and cool settings
Blackout: a game using high-end lighting for ambiance.
Plith, a fast-paced puzzle game

Panda3D Manual: Tasks and Event Handling

Tasks are subroutines (functions) that you write that get called by Panda every frame or every specified amount of time. Event handlers are subroutines that you write that get called by Panda when certain special events occur. Together, these two mechanisms enable you to update your Panda world between rendering steps.