Quasar Analytics is a general-purpose compiler for translating data processing and analytics over semi-structured data into efficient plans that run 100% in the target infrastructure.
Generalized recursion schemes and traversals for Scala.
Purely functional HTTP client
The pure testing library by scalaz.
Reasonable telnet server for Scala.
Scala OpenRTB tools used at @Powerspace
XML Optics library for Scala
Prototype of a Lens implementation for Avro's DataTypes