Cardstack ICO - The experience layer of the decentralized internetWhat is Cardstack ?
It is an open-source framework and consensus protocol that makes blockchains usable and scalable for the mass market, by creating a decentralized software ecosystem.
Foundation and Technology
Since the system is very complex and has many layers, unlike most ICOs this one has extra papers explaining each of system cores in detail.
https://steemit.com/ethereum/@kingscrown/cardstack-ico-the-experience-layer-of-the-decentralized-internet