The document discusses developer tools that are helpful for contributing to open source software projects. It recommends using Linux, Git, GitHub, Vim text editor, Vagrant, Ansible, Makefiles, Travis CI, IRC chat, and OpenShift. The presentation provides an overview of the contributing process, which involves forking a project, reading documentation, running it locally, submitting code via pull requests, getting feedback, and merging changes. It also demonstrates some of the tools in action.