https://omg.omise.co/

Omisego is clearly aiming for mass adoption with a tag line "Unbank the Banked with Ethereum". Their home page describes their mission pretty well...

OmiseGO is a public Ethereum-based financial technology for use in mainstream digital wallets, that enables real-time, peer-to-peer value exchange and payment services agnostically across jurisdictions and organizational silos, and across both fiat money and decentralized currencies. Designed to enable financial inclusion and disrupt existing institutions, access will be made available to everyone via the OmiseGO network and digital wallet framework, starting in Q4 2017.

and...

The OmiseGO network is intrinsically agnostic between fiat and decentralized money: as far as adoption and usage go, the system is constructed so that the best currencies will win.

These statements can describe the aspirations of many other blockchain projects.  What separates this project from others is the experience of the team, highlights include the Bitcoin Lightning Network project, and Ethereum.

Their thinking is also very clear in terms of what matters in a payment, wallets... and simply transferring value between two wallets for each transaction:

The OmiseGO White-label Wallet SDK will allow a diversity of payment solutions to be easily deployed on the robust OmiseGO network. Digital wallet providers have the flexibility to enhance, add, and customize payment solutions for various industries and vertical markets. All transactions across digital wallet providers will be conducted on the OmiseGO network, and decentralized currencies can be traded freely alongside fiat money by all network users.

A decent short blog post review about this project: https://medium.com/@EthereumRussian/ico-review-of-omisego-omg-tokens-on-ethereum-blockchain-7d7972c71dcf

Project White Paper: https://cdn.omise.co/omg/whitepaper.pdf

This has been referenced as an implementation of the Plasma protocol, described here: http://plasma.io/plasma.pdf

Plasma explained here: https://medium.com/chain-cloud-company-blog/plasma-in-10-minutes-c856da94e339