The Network Protocol sniffer formerly known as Ethereal. Live capture tool allows offline analysis ad can read data from ethernet, bluetooth, usb, etc ... and supports every protocol I can think of.
Orange is a component-based data mining software. It includes a range of preprocessing, modelling and data exploration techniques. It is based on C++ components, that are accessed either directly (not very common), through Python scripts (easier and better), or through GUI objects called Orange Widgets.
Bochs is a highly portable open source x86 PC emulator ... capable of running most Operating Systems inside the emulation including Linux, DOS, and all versions of Windows... and the images are portable from one host OS to another.