D is a systems programming language with C-like syntax and static typing. Developed by Digital Mars
License: Open Source
D is a statically typed, compiled language focused on performance and system-level programming, while Groovy is a dynamic language that runs on the JVM, emphasizing ease of use and rapid development. D's strong typing and performance make it suitable for system programming, whereas Groovy's flexibility and scripting capabilities make it ideal for web development and automation.