Vaultwarden
(https://github.com/dani-garcia/vaultwarden/) is an unofficial fork of Bitwarden with the ability to install your own server.
KeePass
(https://keepassxc.org/) is a well-known manager that needs no introduction. No sync, just local storage.
LessPass
(https://www.lesspass.com/) – Simply create a master password to access all your passwords.
Padloc
(https://padloc.app/) – for storing not only passwords, but also other sensitive information related, for example, to finances.
Passbolt
(https://www.passbolt.com/) is an open source password manager for teams and organizations.
Passky
(https://passky.org/) – simple, modern, lightweight open source manager.