Ask HN: How do you manage passwords across your team?

We're having a bit of trouble managing passwords while keeping it secure and reasonably convenient across our development team.

We have tried a number solutions such as written notes on sealed envelopes with a logbook to access (our oldest 'system'), to an SQL database with a custom application, to a LastPass account with a shared master password.

The passwords that we are trying to manage range from credentials for remote desktop, custom applications to SQL auth. We're looking for a system that has to be secure, available to junior devs and editable by senior devs. Also, there are frequent movement on our teams, as well as several vendors which complicate things.

What can you guys suggest? Also, what do you guys use?