Arman Bohn is a creative musician that also creates some FREE VST Instruments. One of them is this FREE Piano VSTi for Windows.
"It has a simple interface with only ADSR controls. It is velocity sensitive. Each note is individually sampled. It runs on MIDI notes 60-84 (C5 to C7) to simulate the limited range of a real toy piano. It is wonky and slightly out of tune." Via