Liana is alright. Maybe not strictly a "privacy" project, but definitely a UX that deserves attention as Bitcoin has been around for 16 years & keeps chugging along.

I'm not really seeing why payjoin couldn't be integrated into an inheritance wallet...there's lots of work to do

What I'd really like to see is an E2EE nostr-enabled multisig cooridinator tool. Everything is role accessible, participants contribute npubs, the registration & signing flow is orchestrated over nostr, the quorum details can be stored encrypted on whatever set of relays you want...