Libiio is a library that has been conceived to ease the development of applications interfacing Industrial Input/Output (IIO) devices through the IIO subsystem of the Linux kernel.

Top level component library. Defines core blocks. Handles settings for logging, performance counters, and control port. Part of the main gnuradio build.

gpgv-sq is Sequoia's alternative implementation of a verification-only interface for OpenPGP signatures. It provides a feature-complete drop-in replacement for the GnuPG project's gpgv.

Library of filter blocks used in gnuradio. Implements FIR, IIR and FFT filters, as well as Polyphase filterbank and PFB arbitrary resampler methods. Part of the main gnuradio build.

Handle forward error correction processing in gnuradio. Implements the GNU Radio FEC API, supporting encoders and decoders for no-op dummmy, repetition, and convolutional classes. Part of the main gnuradio build.

All the functions for doing digital modulation and demodulation, including bpsk, qpsk, gmsk and ofdm signals. Part of the main gnuradio build.