Adshares is developing a blockchain-based platform for programmatic advertising. They're goal is to create a decentralized marketplace to connect publishers and advertisers. Their advertising platform is based on their own blockchain, which is called the Enterprise Service Chain. It has a dPoS consensus mechanism and is powered by the native ADS coin.

AdCoin is an ad network for cryptocurrencies. It was created to allow cryptocurrency related products to be advertised more transparently, with digital ad campaigns that will reach their target demographic. The company is developing plugins, API's and other tools that can be used to connect publishers and advertisers, in a crypto-powered ad exchange.
There are no minimum budgets for campaigns. The network that is fueled with the ACC coin, which has a Proof-of-Work (PoW) consensus protocol.

New Power Coin is developing a blockchain platform that they claim will provide a new source of internet traffic. They hope to use blockchain technology to improve internet targeting for advertisers and to giver users ore control of their personal data. The company's marketing materials do not provide very many details about their existing technology.
New Power coin uses the NeoScrypt algorithm as a Proof-of-Work (PoW) consensus mechanism. The network is powered by the NPW coin.