Grunt, Bower, Yeoman, and NPM are tools that can be used to automate front-end development tasks. Grunt is a task runner that can perform repetitive tasks like minification, compilation, testing. Bower is a package manager for installing web dependencies. Yeoman helps generate project scaffolding and handles tasks like compiling CoffeeScript. NPM (node package manager) installs and manages Node.js packages and programs. These tools can automate workflows, save time, and improve efficiency compared to manually performing repetitive tasks.