Here is a list of all files with brief descriptions:

callable_traits.h
common/context.h
context.h
divideconquer.h
dynamic_execution.h
execution_traits.h
farm.h
farm_pattern.h
fastflow_allocator.h
filter_nodes.h
filter_pattern.h
grppi.h
iteration_nodes.h
iteration_pattern.h
iterator.h
iterator_traits.h
map.h
mapreduce.h
mpmc_queue.h
ordered_stream_filter.h
ordered_stream_reduce.h
pack_traits.h
parallel_execution_ff.h
parallel_execution_native.h
parallel_execution_omp.h
parallel_execution_tbb.h
patterns.h
pipeline.h
pipeline_impl.h
pipeline_pattern.h
reduce.h
reduce_nodes.h
reduce_pattern.h
sequential_execution.h
simple_node.h
stencil.h
stream_filter.h
stream_iteration.h
stream_reduce.h
unordered_stream_filter.h
unordered_stream_reduce.h
worker_pool.h