We will use the ubiquitous combination of Git for version control and GitHub for code hosting. They have all the functionality we require for this project and will fit perfectly into our development workflow with up to three developers working simultaneously on the codebase. We also plan on using GitHub Actions to set up our CI/CD workflows.

VS Code will be our primary code editor due to its combination of developer-friendly features, including a large extensions library, IntelliSense code completion, Git integration, and powerful debugging tools. Furthermore, it offers better performance and more simplicity than full-fledged IDEs while supporting a multitude of languages.

Selenium will be used to perform automated testing of our web application. It supports all major web browsers and operating systems and supports test scripts to be written in multiple languages, including Python which we are also planning to use for our back-end, helping us to consolidate the languages required for our project. In addition, Selenium is free and has support for most CI/CD tools.