Keyfrog composes of two parts: the Keyfrog daemon, and Keyvis visualizer.
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.
Binary: ZIP for all platforms (Java)
Sources (included in the Keyfrog source package): package for all platforms