Fortanix provides a secure secret management solution that can manage application secrets natively in the cloud and on-premises.
Secrets Management Open Source Software Tools
HashiCorp Vault - Manage Secrets & Protect Sensitive Data
AWS Secret Manager: Protect sensitive information and functionality, by Kubernetes Advocate, AVM Consulting Blog
AWS Secrets for Best Practices
Shhh… Can You Keep A Secret? A First Look at AWS Secrets Manager – Cloud Architect Musings
Quick Wins: Top Three Secrets Management Conjur Cloud Use Cases Explained
Secrets Management Solutions, Use Cases
Credential Store using HashiCorp Vault, by Mayank Patel
Sensu Secrets Management: Use Cases, Best Practices, and Tools
Securing credentials using AWS Secrets Manager with AWS Fargate
Modern DevOps external secrets management