Cyclone is a library of PureData classes, bringing some level of compatibility between Max/MSP and Pd environments.

In its current form, cyclone is mainly for people using both Max and Pd, and thus wanting to develop cross-platform patches. In this respect, cyclone has much in common with Thomas Grill's flext, and flext-based externals. While flext enables developing new cross-platform classes, cyclone makes existing classes cross-platform.

Cyclone also comes handy, somewhat, in the task of importing Max/MSP patches into Pd. Do not expect miracles, though, it is usually not an easy task.