Ceylon is a programming language that was designed to improve modularity and productivity in software development, particularly within the Java ecosystem. Developed by Red Hat, the language was first introduced in 2011 by Gavin King, who is also known for his work on Hibernate, a popular object-relational mapping tool for Java. Ceylon aimed to address some of the shortcomings of Java, particularly in terms of its type system and modular capabilities, thereby enhancing the overall development experience.