Popular programming IDEs offer a wide range of features such as code completion, debugging, syntax highlighting, version control, build automation, and refactoring tools. These IDEs are tailored for specific programming languages like Python (PyCharm, Spyder), Java (IntelliJ IDEA, Eclipse), C/C++ (Visual Studio, CLion), and JavaScript (WebStorm, Visual Studio Code). Some popular open-source IDEs include Eclipse, Apache NetBeans, Visual Studio Code, and Atom, while cross-platform IDEs like Visual Studio Code, IntelliJ IDEA, Eclipse, and NetBeans cater to developers working on different operating systems. Additionally, cloud-based IDEs like GitHub Codespaces, AWS Cloud9, Replit, and Gitpod provide developers with the flexibility to work from anywhere with an internet connection.