ColdFusion
ColdFusion is a commercial rapid web application development platform created by Adobe (formerly Macromedia and Allaire). It uses its own scripting language, CFML (ColdFusion Markup Language), to build dynamic web applications, integrate with databases, and handle server-side logic. The platform includes an application server, development tools, and integration capabilities for enterprise systems.
Developers should learn ColdFusion when working on legacy enterprise web applications, particularly in government, education, or large corporate environments where it has been historically adopted. It is useful for rapid prototyping and building data-driven websites due to its simplified syntax and built-in functions for database interactions, email, and file management. However, its relevance has declined in favor of modern frameworks, so it's primarily valuable for maintaining existing systems.