Horde3D

I can export animations from poser (dae) and import into Horde successfully.

However, when the animation is complex (many joint affected), then the animation tends to have "holes," basically joints where the animation is no longer played.

It may be the case that this problem is bilateral, so if the left hand alone is moving there's not a problem, but if both hands are moving (in the original poser animation) the Horde animation has either just one moving and the other in reference pose or both not moving.

Also ColladaConv gives the following warning

Warning: Animation is not sampled and will probably be wrong

This is exactly the problem. We don't support non-sampled animation data at the moment (although support is planned for the future). Some exporters like OpenCollada have an option to create interpolated keyframes at a fixed time step.