Apache Groovy is a powerful, optionally typed and dynamic language, with static-typing and static compilation capabilities, for the Java platform.
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.