Hashicorp Vault has been a rising star in managing credentials for open source powered organizations. Vault has significantly done a good job in keeping up the development, and the wide plugin support over most of DevOps / SysOps toolsets. Wanna use Vault in Jenkins, go ahead! There is already a Hashicorp Vault Plugin out there! You use Terraform too? Built by the creators of Terraform, Vault has made credential management systems in complex organizations a piece of cake.