I use Panda 3D. I’ve chosen it after a long research.I’ve tried other engines (even commercial ones), but this is the only one which has all the features I need. Some features I want to highlight:
- Python scripting
- PStats (profiler)
- complete game engine
- deployment tools (even via the web)
- open source (BSD-like license)
If you’re looking for a game engine, don’t miss Panda 3D!