Keyfrog composes of two parts: the Keyfrog daemon, and Keyvis visualizer. 

Keyfrog daemon
Binaries: for Ubuntu 12.04,  for Ubuntu 12.10
Sources: package for all platforms

Either download a binary package (and install it via `dpkg -i'), or compile the source package.

Keyvis
Binary:  ZIP for all platforms (Java)
Sources (included in the Keyfrog source package): package for all platforms