There are 2 repositories under universum topic.
A collection about awesome blockchains - open distributed public databases w/ crypto hashes incl. git ;-). Blockchains are the new tulips :tulip::tulip::tulip:. Distributed is the new centralized.
Programming Crypto Blockchain Contracts Step-by-Step Book / Guide. Let's Start with Ponzi & Pyramid Schemes. Run Your Own Lotteries, Gambling Casinos and more on the Blockchain World Computer...
Best of Crypto Books - A collection of books, white papers & more about crypto and blockchains.
universum library / gem (ruby edition) - next generation ethereum 2.0 world computer runtime; run contract scripts / transactions (in plain vanilla / standard ruby) on the blockchain; update the (contract-protected / isolated) world states with plain vanilla / standard SQL - work-in-progress / experimental
Information and disassembled code of the ZX Spectrum assembler by Proxima