Glava 1.4, 16 bytes
Edit: from Doorknob's and ConorO'Brien's suggestions, the name has changed to Glava.
p("Hello, World! Glava is a golfing Java dialect (obviously). It adds shorthands to many keywords and common phrases in Java code. So, the code above actually corresponds to the Java code:
System.out.print("Hello World!") You may be wondering, where does the ") come from? Well, Glava has a feature where it automatically adds closing brackets and double quotes. Also, when a closing curly bracket is needed, it places a semicolon before it.
Another neat feature is that if you do not specify a main class or method, it will do it for you. So the compiled code in the end looks like:
public class Main {public static void main (String[] A) { System.out.print("Hello World!");}}