Armory is a desktop bitcoin wallet that is open source and multi-signature. It is a well known and reputable brand, and is a leading company in the field of Bitcoin security. They provide a cold storage option, where users can store private keys offline.
The interface can be difficult to use and it is not the best option for beginners, but it is regarded as one of the most secure bitcoin wallets available. Armory has some of the best security features of any desktop wallet. It has multi-signature support and decentralized storage, that give users full control over their cryptographic keys. Armory allows users to secure multiple wallet addresses so that they can easily store bitcoin for different accounts.

Jax is a desktop wallet