Check out the surprisingly playable online prepared piano created by Andreas Busk-Jepsen!
Apart from playing it online, Andreas has been kind enough to provide a free download of a 37 key sampleset of the prepared piano in Kontakt, Ableton Live (Sampler & Simpler) & Logic EXS formats… Available here – thanks Andreas! Also check out his blog where he links to music created using the samples…
this is great. thanks for sharing.
Here is a link to a whole lot of free samples as well: http://www.edmsound.com/free-sounds-and-samples.html