ODE:
ODE is an open source, high performance library for simulating rigid body dynamics. It is fully featured, stable, mature and platform independent with an easy to use C/C++ API.
http://ode.org/
The C/C++ part means that you can't use ODE "drag'n'drop" style unless in your programs you're coding with those languages. Blitz3D needs a wrapper before we can use ODE - and those "engines" you have seen are just those, Blitz3D wrappers for ODE. Persoanlly I ilke (and have bought) JV-ODE (aka Jedive-ODE).
ODE is an open source, high performance library for simulating rigid body dynamics. It is fully featured, stable, mature and platform independent with an easy to use C/C++ API.
http://ode.org/
The C/C++ part means that you can't use ODE "drag'n'drop" style unless in your programs you're coding with those languages. Blitz3D needs a wrapper before we can use ODE - and those "engines" you have seen are just those, Blitz3D wrappers for ODE. Persoanlly I ilke (and have bought) JV-ODE (aka Jedive-ODE).