Powerful new number types and numeric abstractions for Scala.
Jawn is for parsing jay-sawn (JSON)
Compiler plugin for making type lambdas (type projections) easier to write
Cats instances and classes which are outlaws, miscreants, and ne'er-do-wells.
Provide names for numbers in English
macro for summoning implicit values
Fast, deboxed, specialized data structures for Scala
Efficient immutable wrappers for unboxed data
methods for divination and predicting the future
Simple, efficient wrapper for fast concatenation/iteration.
Library that provides those stupid little IO utility methods you always end up needing.
Run javap directly from the SBT console
Discover java object sizes through questionable sleuthing plus luck.