The LavaRND project is a very interesting take on providing a cryptography strong random generator framework.
Both in terms of plans for physical devices to software library.
If only I had more time I would love to try building one of their device, nevertheless, I highly recommend this website as it is full of very interesting information related to randomness and they even have some interesting demo using their random framework. You do not require an interest in cryptography to appreciate the work done.
Next time I need a strong random generator algorithm, I will know where to look :)