Nunchuck.io - it’s a bitcoin wallet. It can be used to do multi sig and single sig. I believe it can do cool stuff with team members approving transactions. The thing that interests me, however, is their paid service that lets you set spending limits and do KYC-free inheritance.

Casa and Unchained are kind of similar wallets (and are really nice) but one is way more expensive and the other requires KYC.