Nethereum is an open source .NET integration library for Ethereum. It is designed to help developers easily integrate the Ethereum blockchain into their .NET applications. It consists of modular libraries for features that are covered are writing smart contracts, cryptographic wallets, DApps, and managing blockchain data.

Chromia is a relational blockchain platform that is designed to be both a blockchain and a relational database. Chromia was created by a Swedish development company called ChromaWay, with the intention of combining the advantages of a blockchain's transparency with the benefits of a relational database system, such as data independence and reduced redundancy.

Bytecent is developing a decentralized rewards network powered by blockchain. Bytecent allows merchants to create customer loyalty programs that are cross-site and cross-platform compatible. Consumers are not restricted to using their rewards with just one merchant, and can redeem them anywhere Bytecent is accepted. In addition to secure transactions and portability, Bytecent never expire and there are no limitations on how many Bytecent you can accumulate or spend. BYC can be converted to Bitcoin, cash, and gift cards. Bytecent uses a variation of Proof-of-Work (PoW) for consensus that requires miners to manually attend to their computers and is called Proof-of-Miner (PoM). It's designed to prevent the use of advanced and autonomous mining hardware. Avanquest Software, a leading developer of consumer software, has implemented Bytecent for their rewards program.