Library of vocoder blocks, including ulaw, alaw, gsm and codec2. Debian uses external libraries for gsm and codec2.

0MQ messaging library support. Provide network socket endpoints for gnuradio data and message streams. PUB/SUB, PUSH/PULL, REP/REQ models supported.

Iceoryx is an inter-process communication (IPC) middleware for POSIX based operating systems. It features shared memory capabilities which allow a true zero-copy data transfer.

PNG is a file format to store raster images losslessly with good compression, supporting different color types and alpha channel.

bemenu is a dynamic menu for tty (using ncurses), X11 and/or Wayland, inspired by dmenu. It reads a list of newline-separated items from standard input. When the user selects an item and presses Return, their choice is printed to standard output and bemenu terminates. Entering text will narrow the items to those matching the tokens in the input.

pytz has served the Python community well for many years, but it is no longer the best option for providing time zones. pytz has a non-standard interface that is very easy to misuse; this interface was necessary when pytz was created, because datetime had no way to represent ambiguous datetimes, but this was solved in Python 3.6, which added a fold attribute to datetimes in PEP 495. With the addition of the zoneinfo module in Python 3.9 (PEP 615), there has never been a better time to migrate away from pytz.