Morph is a multi-cryptocurrency wallet that supports XRP, BTC, ETH, XLM, LTC, NEO, and GAS. It is available on Android, iOS and Web browser and features 2FA.

mSigna Wallet is no longer offered. The wallet was designed by the software company Ciphrex in the time of crypto rush in 2017. The developer’s Twitter media had not published any updates since mid-2017.

The MT Wallet was developed by the ModulTrade project for the MTRc token. It is a web wallet that supports BTC, ETH, and MTRc, which MT Wallet users can trade (buy/sell). Additionally, the users are allowed to proceed payments to the smart-contract on ModulTrade trading platform (as an interface for MT blockchain).

MultiDoge wallet is a desktop client used for managing Dogecoin currency as a means of payment. It is a light wallet introduced by the Dogecoin developers. MultiDoge is open-source.

MyCrypto is an open-source web application used for operations with Ethereum coins and ERC-20 tokens. 

Natrium is designed to be a fast, robust, & secure wallet for the NANO cryptocurrency.

NEM Mobile Wallet is a lite client app and allows managing multiple NEM accounts on the device.

The NEM Nano Wallet is a light version of the NEM wallet for those that don't want to runn a full node and store the blockchain.

The NEO Tracker Wallet is a web wallet for NEO and GAS.

The NEON Wallet is an Open Source Windows, Mac OS, and Linux wallet for NEO, GAS and other NEP5 tokens. Its lightweight, this meaning that you don't have to download the whole blockchain and still get to have access to transactions and being possible to make transactions.

The NEVERDIE wallet is an Ether ERC-20 wallet with new tokens being frequently added.

Noku Wallet is a free, open-source Web wallet for easily interacting with the Ethereum network.

NXT full-node wallet (NXT Client) is an open-source official NXT platform. The NXT Client online wallet was closed in 2017 with all functions of the NXT official wallet being remained with concurrent developments. 

Oasis Trade is a decentralized exchange (DEX) that offers a unique set of features and functionalities designed to enhance the user experience. In this review, we will explore Oasis Trade's features and functionalities in five subheadings: Company Background, Mission and Vision, Features and Functionalities, User Experience, and Future Prospects.

OctoBit.IO is a multicurrency online wallet featuring 2FA for verification and an instant exchange of all supported crypto-currencies on the wallet. OctoBit.IO supports BTC, ETH, LTC, DASH, WAVES, and more.

Omni wallet is an open-source web wallet for the Omni Layer. It means the wallet that supports Bitcoin and Omni Protocol assets such as Omni Tokens. 

OpenLedger is an open-source Bitshares web wallet with a built-in decentralized exchange.

OPOLO Cosmos is a hardware multi-cryptocurrency wallet that comes with a single wallet application, which can be installed on Windows, Linux, and Mac to access all integrated coins and tokens from one easy to use app. OPOLO wallet supports over 1500 cryptocurrencies.

OWNR is smart and secure cryptocurrency wallet to store all digital assets. Buy, sell, send, store and exchange crypto in one free app: BTC, BCH, ETH, EOS, ETC, ERC20 tokens, LTC, Omnilayer, Dogecoin, and others. Manage all crypto in a single app, swiftly and simply.

OWNR is a licensed multi-asset crypto wallet created to deliver a simpler and smoother experience.

Parity Signer is a cold storage mobile application, allowing smartphones to be used as off-line wallets. To sign a transaction, a user should disconnect their smartphone off all the networks.