https://www.gnu.org/manual/blurbs.html
Ball and Paddle is a classic arcade game in which you use a paddle
at the bottom of the screen to bounce a ball against bricks in the
upper region, eliminating the bricks as they are hit. As a novel
twist, events and attributes of all the objects (bricks, ball, etc.)
may be scripted with GNU Guile.
GNU Barcode is a flexible tool to produce printed barcodes from text
strings. It supports a variety of encoding standards and sizing
measurements. Barcodes can be output in PostScript or Encapsulated
PostScript formats.
Bash is the shell, or command-line interpreter, of the GNU system.
It is compatible with the Bourne Shell, but it also integrates useful
features from the Korn Shell and the C Shell and new improvements of
its own. It allows command-line editing, unlimited command history,
shell functions and aliases, and job control while still allowing most
sh scripts to be run without modification.
Bayonne is the telephony server of the GNU Telephony project. It
offers a scalable environment for the development and deployment of
telephony solutions, with a focus on SIP.
GNU Bazaar is a version control system that allows you to record
changes to project files over time. It supports both a distributed
workflow as well as the classic centralized workflow.
bc is an arbitrary precision numeric processing language. It includes
an interactive environment for evaluating mathematical statements.
Its syntax is similar to that of C, so basic usage is familiar. It
also includes dc, a reverse-polish calculator.
GNU Binutils is a collection of tools for working with binary files.
Perhaps the most notable are ld, a linker, and as, an assembler. Other
tools include programs to display binary profiling information, list
the strings in a binary file, and utilities for working with archives.
The bfd library for working with executable and object formats is
also included.
GNU Bison is a general-purpose parser generator. It can build a
deterministic or generalized LR parser from an annotated, context-free
grammar. It is versatile enough to have many applications, from parsers
for simple tools through complex programming languages.
GNU Bool is a utility to perform text searches on files using Boolean
expressions. For example, a search for hello AND world would
return a file containing the phrase Hello, world!. It supports
both AND and OR statements, as well as the NEAR statement to search for
the occurrence of words in close proximity to each other. It handles
context gracefully, accounting for new lines and paragraph changes.
It also has robust support for parsing HTML files.
GNU BPEL2oWFN translates a web service expressed in Web Service Business
Process Execution Language (WS-BPEL) into an open Workflow Net (oWFN).
It may additionally convert a BPEL4Chor choreography to a Petri Net model.
Properties of Petri Nets may be analyzed efficiently, due to the use
of static analysis to make the models compact. Control and data flow
analysis, as well as basic checks for deadlocks and other such properties
are available.