SelfKey is developing a blockchain-based self-sovereign identity ecosystem. Their decentralized identity management solutions are designed to allow users to better control their personal information, while also facilitating KYC procedures for a variety of purposes. SelfKey's platform revolves around the concept of Proof Of Reputational Stake, which requires users to stake Ethereum-based KEY tokens to participate in the network. Smart contracts release the staked tokens when the user leaves the ecosystem

3Box is developing an identity management platform for Ethereum-based DApps. Users will be able to create a profile that will allow them to sign in to DApps with one click. 3Box is a ConsenSys portfolio company.

The Sovrin Foundation is a non-profit organization dedicated to establishing the Sovrin network. Their goal is to create a purpose-built blockchahin, with a native token, that will facilitate creating and maintaining self-sovereign identities. The Sovrin token will provide incentives to value exchange that preserves privacy. It could also enable a global marketplace for digital credentials and personal data.
This is an important project that has lofty goals, but has the potential to revolutionize several major industries.