These are some best and providing free tier for cloud management solutions you can choose from:-
Brainboard - Everything you have in the Cloud, Visually Design, Deploy & Manage to Make Infrastructure-as-Code (IaC) a team game. Collaborative solution to visually build and manage cloud infrastructures from end-to-end.
Pulumi — Deliver infrastructure faster with high velocity and scale through software engineering. Modern infrastructure as code platform that allows you to use familiar programming languages and tools to build, deploy, and manage cloud infrastructure.
terraform.io — You can automate Infrastructure on Any Cloud by Provision, change, and version resources on any environment. Terraform Cloud. Free remote state management and team collaboration for teams up to 5 users.