I created three clickable keyboard objects that may be handy when dealing with MIDI. They can also be used to visualize MIDI data coming in. See:
For Pd-extended: keyboards-pd-extended.zip
For Pd-l2Ork (the current build in their website is a bit old and you may need to compile it from source in order to use it: as far as I remember, the pre-compiled .deb build available in their website still does not allow images to be clickable, but I may be wrong with that): keyboards-pd-l2ork.zip
Please note that these do not work on Windows as they rely on moonlib's [absolutepath], which isn't available for neither Windows 32-bit nor 64-bit.
I hope you all will enjoy it!