Vaultwarden
Vaultwarden is an unofficial Bitwarden server implementation designed for self-hosted deployments. It is written in Rust and is compatible with the official Bitwarden clients. This application is ideal for individuals, families, and smaller organizations who find the official resource-heavy service undesirable. Vaultwarden supports a wide range of features including personal and organization vault support, password sharing and access control, file attachments, two-step login via email, Duo, YubiKey, and FIDO2 WebAuthn, and many more. It also supports live sync for desktop/browser clients/extensions and mobile clients (Android/iOS). However, it does not prioritize the development of features mainly useful to larger organizations such as single sign-on and directory syncing.
Passky Server
Passky is a simple, modern, lightweight, open source and secure password manager. It allows you to securely store and manage your passwords, ensuring your sensitive credentials remain protected. This self-hosted server component works with the Passky clients (web, desktop, and mobile apps) to provide a complete password management solution that puts you in control of your data.