SCC is a layered library of Streaming Component Combinators. The lowest layer in Control.Concurent.SCC.Streams defines stream abstractions and nested producer-consumer coroutine pairs based on the Coroutine monad transformer. On top of that are streaming component types, a number of primitive streaming components and a set of component combinators. Finally, there is an executable that exposes all the framework functionality in a command-line shell. The original library design is based on paper http://conferences.idealliance.org/extreme/html/2006/Blazevic01/EML2006Blazevic01.html Mario Blažević, Streaming component combinators, Extreme Markup Languages, 2006.