syspass — PHP, MySQL; installable (Docker, standalone); questionable security model (shared master password which needs to be told to every user); extensive initial setup (there are no default policies and so on); confisung terminology (the use of the term “account” is quite contradictory and leads to misunderstanding)

Passbolt — installable (Docker); requires browser extension which basically makes it unusable

clipperz — Python; is an online service, there is a source code but it lacks security features (alternatives)

Passit — online and self-hosted; Python, PostgreSQL; decent security model (alternatives)

passman (alternatives)

Psono — requires public domain name and public access

https://alternativeto.net/software/supergenpass/about/

https://alternativeto.net/software/passman/?p=5