Pitch shifting

G09.pitchshift.pd in the help patches is an implementation of pitch shift with 2 overlapping delays. Miller explains the techniques in his online book. Here is a more detailed explanation, followed (click on next>>) by an implementation of pitchshifting library. You can download this tool and try it for yourself. This is one of the great things about Pd and open source -  it allows anyone to contribute from their own expertise. 

Pd patches

• A repository for Pd with an interactive website, examples patches, and documentation of a variety of project.
•  Pd website includes a section of patches shared by users
• A modular synth build with Pd with some examples. 

Live coding

Here is a documentary explaining what is live coding. And a version of Reich's Piano Phase done with live coding. 

Live electronics

Some examples of music for solo instrument with electronic processing:

• Music for hihat and computer Cort Lippe
• The Twittering Machine Andrew May
• Sequitur XIV Karlheinz Essl (and other interesting pieces). 

Interaction

Analogue 'sequencer' using distance sensor (with the arduino platform).
Silent Drum from Jaime Oliver (not jamie) using Pd/Gem to map gesture to audio creating a new instrument.