"really good" is going to be subject to opinions; a non-exhaustive list:

Poser scene file import

Vue -> direct import
Carrara -> direct import
Daz Studio -> direct import
Cinema 4D -> import via Plugin
POVRay -> immport via PoseRay
Kerkythea -> import via PoseRay

The degree to which Poser features are supported on import varies - Google or Bing away for specifics. The vast majority of apps probably support importing .obj format. I wouldn't be too quick to conclude that Poser can't do it though.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken