AviatorscriptA high performance scripting language hosted on the JVM.
ScalaScala 2 compiler and standard library. For bugs, see scala/bug
HaxeHaxe - The Cross-Platform Toolkit
GroovyApache Groovy: A powerful multi-faceted programming language for the JVM platform
JBWAPIPure Java BWAPI Client implementation for JVM languages
CASCA Go Lang / V Lang / Rust syntax approach in JVM language.
iokkInternational Obfuscated Kotlin Contest
mjolnirThor Hammer and a way to express invokedynamic in Java
xoom-clusterThe VLINGO XOOM platform SDK cluster management for Reactive, scalable resiliency of JVM tools and applications running on XOOM LATTICE and XOOM ACTORS.
KValidationValidation library. Fluent syntax in Java, mini DSL in Kotlin
jispSmall Lisp expression interpreter made in Java