Terraformer - CLI tool to generate terraform files from existing infrastructure (reverse Terraform). Infrastructure to Code.
Checkov - Static code analysis tool for infrastructure-as-code. It scans cloud infrastructure provisioned using Terraform, Cloudformation or kubernetes and detects security and compliance misconfigurations.
terraform-exec - Go module for constructing and running Terraform CLI commands. Structured return values use the data types defined in terraform-json.
Terraform Google Bootstrap - Help bootstrap a GCP organization, creating all the required GCP resources & permissions to start using the Cloud Foundation Toolkit (CFT).