Ircam also offer the Ethersense, a sensor to OSC deveice

The gluiph is another innovative option for sening offering OSC compatability, and a range of variations to suit different needs

The Dumb Controller is one of Angelo Fraietta's range of controller options, including the Smart Controller , Mini and Micro Controllers. Some of these provide OSC rather than MIDI I/O, and wireless, and the Smart Controller contains an embeded PC so is fully programmable and can operate standalone.

Some Online Tutorials about writing patches for the Smart Controller in Algorithmic Composer are online.

The Open Sound Contol (OSC) option is certainly a great feature

A collection of excellent looking interfaces for creative arts sensing systems Phidgets Interfaces They can be controlled from Windows, Linux, and Mac OS X. High-level programming interfaces are available for Visual Basic, C, C++, Flash, .NET, Java, LabVIEW, etc.

Also a bunch of plug-and-play sensors here

Kits for driving servo motors etc

The Teabox sensor interface is an interesting alternative from Tim Place, utilising the SPDIF Digital audio interface to carry the sensor data which is modulated onto the audio stream, maintaining sample acurate synchronisation of all sensing data, something no other sensor box offers. They also offer some excellent sensors to suit the teabox.

The I-Cube is one of the most established interfacing options on the market, including wireless options. A little more expensie than other options, but well supported, reliable and with a large range of sensors also available. Axel has done some excellent work in this area, so well worth taking a look.

Cool and compact controller interfaces Faderfox home page