Scala is full of many libraries that take advantage of trailing closures. I think their standard library Future/Promise API is good example: http://docs.scala-l

Scala is full of many libraries that take advantage of trailing closures. I think their standard library Future/Promise API is good example: http://docs.scala-lang.org/overviews/core/futures.html http://docs.scala-lang.org/overviews/core/futures.html Edit: Another popular one is the ScalaTest unit testing framework: http://www.scalatest.org http://www.scalatest.org