The Fantom Programming Language

The Fantom programming language compiles into bytecode ("fcode") that can be easily compiled to run on the JVM and CLR. There is an interesting blog post on Fan vs Scala.  It was started as a part-time project in 2005.

Programming in Scala, Third Edition

As of April 2016, Programming in Scala is now in its Third Edition. Authors are Martin Odersky (the language's creator, and also a professor at EPFL in Lausanne, in the French speaking part of Switzerland, and a Fellow of the ACM), Lex Spoon (an engineer at Semmle) and  Artima President Bill Venners.