appliance/
The qemu appliance, build scripts and so on.
+cat/
+ The virt-cat tool.
+
capitests/
Automated tests of the C API.
daemon/
The daemon that runs inside the guest and carries out actions.
+df/
+ The virt-df tool.
+
examples/
The examples.
Source code to the C library.
Also contains the crucial generator program.
+test-tool/
+ Interactive qemu/kernel test tool.
+
v2v/
Xen to KVM (V2V) conversion tool.