Some popular open source web development frameworks are AngularJS, ReactJS, Ruby on Rails, Django, and Node.js.AngularJS is widely used for building dynamic web applications.ReactJS utilizes a component-based approach to help developers create reusable UI components.Ruby on Rails is again a popular framework offering robust tools for building web applications.Django, a Python-based framework, helps create rapid application development.Node.js is a server-side platform that allows you to build scalable, high-performance applications using JavaScript.Developers can use these frameworks to develop superior applications within budgets and with few errors.