GNU Radio uses discrete signal processing blocks that are connected together to perform your signal processing application. This manual contain a list of all GNU Radio C++ Blocks, sorted by category.
Please note that at this time, we haven't found an acceptable way to provide unified documentation for the C++ parts of the system and the parts written in Python (mostly hierarchical blocks). Until this gets worked out, please bear with us, or better yet, solve it for us!
All our in-tree components have their own top-level documentation: