Slack, Trello, Jira, Drive, Miro, Excalidraw.
Git, Gitea, GitHub, GitLab.
AWS, GKE, Azure, DigitalOcean.
GitHub Actions, CircleCI, Jenkins, TravisCI.
Your own language specific test frameworks, Selenium, Cucumber.
Terraform, OpenTofu, Ansible, Puppet, Chef, SaltStack.
Docker, Kubernetes, Mesos.
Prometheus, Grafana, ELK (Elasticsearch, Logstash, Kibana), Jaeger, Zipkin, DataDog, PagerDuty.