Spring Boot is the most widely used Java framework for building production server applications. Built on top of the broader Spring Framework, Spring Boot adds auto-configuration, an embedded application server, and a "starter" dependency system so developers can launch a working web application in minutes instead of wiring XML configuration by hand.

Core pieces

• Auto-configuration. Spring…

Ruby on Rails (or just Rails) is a server-side web framework written in Ruby and released in 2004. Rails popularised the "convention over configuration" philosophy, the MVC pattern in web frameworks, and the idea that one developer could build a complete production application in days. GitHub, Shopify, Basecamp, and many SaaS products are built on Rails.

Core pieces

• Active Record. The ORM…