Ethereum is a public blockchain platform with programmable transaction functionality. It provides a decentralized virtual machine that can execute peer-to-peer contracts using a crypto asset called Ether. Ethereum can be used to codify, decentralize, secure and trade just about anything: voting, domain names, financial exchanges, crowdfunding, company governance, contracts and agreements, intellectual property, and even smart property.
There are hundreds of projects that are being developed with Ethereum as the base. Some of the major projects being developed are: Ethcore, Slock.IT, Consensys, Etherparty, Augur, etc.
PRODUCTS & SERVICES:
Infrastructure that allows anyone to build smart contracts and transaction platforms. Ex.: Design and issues own currency, Crowdfunding or Crowdsale project, Democratic Autonomous Organization (DAO), Mix IDE - an IDE for the blockchain era.
Has multiple partnerships with players who are looking to build decentralized applications or smart contracts in the blockchain space. Some of the big ones are: IBM & Samsung, Microsoft Azure, R3CEV etc.
Vitalik Buterin, Gavin Wood, Mihai Alisie, Jeffrey Wilcke, Charles Hoskinson, Anthony Di Iorio