What are the popular DevOps tools that you use?

We use the following tools for work in DevOps: 

1. Jenkins:- This open-source automation server is used as a continuous integration tool. We can build, deploy and run automated tests with Jenkins. 
2. GIT:- It is a version control tool for tracking files and software changes. 
3. Docker:- This is a popular tool for the containerization of services. It is very useful in cloud-based deployments. 
4. Nagios: We use Nagios for monitoring IT infrastructure. 
5. Splunk:- This is a powerful tool for log search and monitoring production systems. 
6. Puppet:- We use Puppet to automate our DevOps work so that it is reusable