List of most useful Terraform open-source tools

• terraformer

  111 12,687 4.9 Go

  CLI tool to generate terraform files from existing infrastructure (reverse Terraform). Infrastructure to Code

  

  "Reverse"/creating from existing cloud resources:Terraformer: https://github.com/GoogleCloudPlatform/terraformerAztfy (Azure only): https://github.com/Azure/aztfy

• SaaSHub

  www.saashub.com featured

  SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

  

• atlantis

  122 7,855 9.8 Go

  Terraform Pull Request Automation

  

  Basic GitOps:Atlantis - https://www.runatlantis.io/

• aztfy

  19 1,034 9.6 Go

  Discontinued A tool to bring existing Azure resources under Terraform's management [Moved to: https://github.com/Azure/aztfexport]

  

  "Reverse"/creating from existing cloud resources:Terraformer: https://github.com/GoogleCloudPlatform/terraformerAztfy (Azure only): https://github.com/Azure/aztfy

• terragrunt

  63 8,115 9.6 Go

  Terragrunt is a flexible orchestration tool that allows Infrastructure as Code written in OpenTofu/Terraform to scale.

  

  DRY wrapper:Terragrunt: https://github.com/gruntwork-io/terragrunt

• OPA (Open Policy Agent)

  97 9,748 9.7 Go

  Open Policy Agent (OPA) is an open source, general-purpose policy engine.

  

  Policy as code:OPA: https://github.com/open-policy-agent/opa

• checkov

  57 7,173 9.9 Python

  Prevent cloud misconfigurations and find vulnerabilities during build-time in infrastructure as code, container images and open source packages with Checkov by Bridgecrew.

  

• tfsec

  30 6,726 5.7 Go

  Tfsec is now part of Trivy

  

• terrascan

  23 4,774 5.6 Go

  Detect compliance and security violations across Infrastructure as Code to mitigate risk before provisioning cloud native infrastructure.

  

• kics

  13 2,104 9.9 Open Policy Agent

  Find security vulnerabilities, compliance issues, and infrastructure misconfigurations early in the development cycle of your infrastructure-as-code with KICS by Checkmarx.

  

• infracost

  87 11,064 9.5 Go

  Cloud cost estimates for Terraform in pull requests💰📉 Shift FinOps Left!

  

  Cost:Infracost (estimation): https://github.com/infracost/infracostTerratag (tagging): https://github.com/env0/terratag (disclaimer, I am CEO at env0)

• terratag

  7 947 5.7 HCL

  Terratag is a CLI tool that enables users of Terraform to automatically create and maintain tags across their entire set of AWS, Azure, and GCP resources

  

  Cost:Infracost (estimation): https://github.com/infracost/infracostTerratag (tagging): https://github.com/env0/terratag (disclaimer, I am CEO at env0)

• terraform-docs

  33 4,290 8.1 Go

  Generate documentation from Terraform modules in various output formats

  

  Documentation:terraform-docs: https://github.com/terraform-docs/terraform-docs

• pre-commit-terraform

  15 3,235 8.7 Shell

  pre-commit git hooks to take care of Terraform configurations 🇺🇦

  https://github.com/antonbabenko/pre-commit-terraform because Terraform/Terragrunt configs should be documented, tidy and valid all the time :)

• atmos

  10 813 9.1 MDX

  👽 Terraform Orchestration Tool for DevOps. Keep environment configuration DRY with hierarchical imports of configurations, inheritance, and WAY more. Native support for Terraform and Helmfile.

  

  Check out atmos for a fresh take at managing terraform configurations and terraform workflows. Instead of managing HCL `.tfvar` files manually for configuration, it uses YAML, and supports concepts of imports (via deep merging), remote imports (anything supported by gogetter), mixins, inheritance, multiple-inheritance, vendoring of root modules, workflows, task runners (via custom subcommands), and much more. There's a bit of a learning curve and mind-shift required if coming from a Terragrunt background, but the experience is mindblowing after switching to it. Also, it's not limited to terraform.

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