...Users hold the ECDSA private keys to their own money and transact directly with each other, with the help of the network to check for double-spending. They are also able to participate in the network protection using own money or computing power.
A hybrid Proof-of-Work & Proof-of-Stake scheme is used to provide a protection against double-spend.
The main project repository:
https://github.com/novacoin-project/novacoin
PyramidWorkshop is an image-compression System based upon the scientific work of John Robinson (inventor of BTPC) about image-compression with adaptive linear predictors and is in average more efficient than PNG/JPEG2000.