List of free app-configuration tool/service for developerππ½

Doppler
Doppler is the easiest way to securely manage all your environment variables in one encrypted place. No more sharing secrets over Slack or copying .env files.
Tag: app-configuration, secrets-manager
Unlimited Users Unlimited Secrets Secrets Referencing

Dotenv
Sync your .env files, quickly & securely. Stop sharing them over insecure channels like Slack and email, and never lose an important .env file again. From the same people that pioneered dotenv - trusted by more than 2.5 million developers.
Tag: app-configuration, secrets-manager
Unlimited secrets Unlimited projects Slack notifications Partner integrations Multiple environments Custom environments User access controls Version history