KeePassXC is described as 'Open-source password manager storing passwords, notes, and attachments offline with AES-256 encryption, browser extensions, cross-platform support, and TOTP' and is a leading password manager in the security & privacy category. There are more than 100 alternatives to KeePassXC for a variety of platforms, including Windows, Mac, Android, iPhone and Linux apps. The best KeePassXC alternative is Bitwarden, which is both free and Open Source. Other great apps like KeePassXC are KeePass, Proton Authenticator, Ente Auth and Proton Pass.
Password generator. You supply the website and a master password, it generates you a password for that website. You remember only a single master password and can generate different passwords for each website you visit.
