Tip Tip Tip Cheeepeeeee
http://samchillian.com

Samchillian's Tip Tip Tip Cheeepeeeee (patent #5,565,641) is a computer style keyboard MIDI controller based on changes of pitch, rather than fixed pitches. This scheme gives the performer the ability to perform extremely quick, rhapsodical lines. There is a software-only version for PCs.

Master Gaita
http://arakis.es/~jpresedo/midig/mgengl.html

Master Gaita ® is a MIDI Bagpipe Controller from Spanish developer J. Presedo. It allows bagpipe players access to other MIDI instruments and to computers for learning about bagpipe technique and music. The instrument is made of a PVC tube with nine extremely sensitive contacts. A semi-rigid cable connects to a plastic box that carries the MIDI signals to the computer or sound module.

Ohm
http://lividinstruments.com

Ohm is an  innovative new MIDI control surface from Livid Instruments. Custom designed for real-time audio and video performance, Ohm gives you expressive hands-on control of sound, video, and images. Users will find it to be highly intuitive and adaptable to music generation with programs like Ableton Live®, and FL Studio®. Ohm also makes an ideal companion for hardware such as analog synthesizers, video mixers, DJ software, lighting equipment, and other musical instruments