Projects
Converting a Raspberry Pi into an OpenFlow Switch
Since acquiring an OpenFlow switch is quite costly, I've managed to convert a cheap Raspberry Pi into an SDN-enabled switch.
There is a detailed tutorial in my personal blog regarding how to convert it. Please go through it; it might save you a lot of money.
Converting a PC into a Gigabit OpenFlow Switch
It more or less follows the same procedure as Raspberry Pi, except that it needs to use an older kernel.