I've dowloaded trial version of "Shredder Classic".
I'm impressed with its nice looking GUI.
You can set ELO level of the engine to the desired value, however I cannot say if the ELO level is accurate.
The analysis feature also works fine (for me at least).
I think it's the best choice from the shareware category.
But how does it look like in comparison to Fritz?
I'm not talking about engine strength and game databases/tutorials (which Shredder Classic lacks).
What's most interesting for me, is the analysis and "sparring-partner" features.
thanks for your comments!