Eclipse
Eclipse is an open-source integrated development environment (IDE) primarily used for Java development, but extensible through plugins for other programming languages and frameworks. It provides features such as code editing, debugging, testing, and project management in a modular, plugin-based architecture. Originally developed by IBM and now managed by the Eclipse Foundation, it is widely adopted in enterprise and academic settings.
Developers should learn Eclipse for Java-based projects, especially in enterprise environments where it is a standard tool, or when working with Eclipse-based technologies like Eclipse RCP (Rich Client Platform). It is also valuable for its extensive plugin ecosystem, which supports languages like C/C++, Python, and web development, making it a versatile choice for multi-language projects. Use cases include large-scale Java applications, plugin development, and academic teaching due to its free and open-source nature.