Way Piano is a free multi sampled Steinway piano that made up from three different SF2 Soundfont files.
Simon Larkin extracted the samples from said files and with a little processing and glueing together he made a nice sounding piano that would be quick and easy to use.
Although very much an instrument for one purpose, he has included the ADSR amp envelope controls alongside a volume, pan and reverb control, allowing a little more sound shaping possibilities.
There are both 32 and 64 bit windows versions available as well as an AU version for Mac.
Info & Download >> Way Piano