Common C++ is a GNU package which offers portable "abstraction" of
system services such as threads, networks, and sockets. Common C++
also offers individual frameworks generally useful to developing
portable C++ applications including a object persistance engine, math
libraries, threading, sockets, etc. Common C++ is small, and highly
portable. Common C++ will support most Unix operating systems as well
as Win32, in addition to GNU/Linux.

DirectFB is a thin library that provides hardware graphics
acceleration, input device handling and abstraction, an integrated
windowing system with support for translucent windows, and multiple
display layers on top of the Linux framebuffer device. It is a complete
hardware abstraction layer with software fallbacks for every graphics
operation that is not supported by the underlying hardware. DirectFB
adds graphical power to embedded systems and sets a new standard for
graphics under Linux.

dotconf is a simple-to-use and powerful configuration-file parser
library written in C. The configuration files created for dotconf look
very similar to those used by the Apache Webserver. Even
Container-Directives known from httpd.conf can easily be used in the
exact same manner as for Apache-Modules. It supports various types of
arguments, dynamically loadable modules that create their own
configuration options on-the-fly, a here-documents feature to pass very
long ARG_STR data to your app, and on-the-fly inclusion of additional
config files.

Freeglut is a completely open source alternative to the OpenGL Utility
Toolkit (GLUT) library. GLUT was originally written by Mark Kilgard to
support the sample programs in the second edition OpenGL Redbook. Since
then, GLUT has been used in a wide variety of practical applications
because it is simple, universally available, and highly portable.

GLUT (and freeglut) allow the user to create and manage windows
containing OpenGL contexts and also read the mouse, keyboard, and
joystick functions on a wide range of platforms.

Gd allows your code to quickly draw images complete with lines, arcs,
text, and multiple colors. It supports cut and paste from other images
and flood fills. It outputs PNG, JPEG, and WBMP (for wireless devices)
and is supported by PHP4.

The gperftools package contains some utilities to improve and analyze the performance of C++ programs. This includes an optimized thread-caching malloc() and cpu and heap profiling utilities.

Formerly the google-perftools package.

The GNU Scientific Library (GSL) is a collection of routines for
numerical computing. The routines are written from scratch by the GSL
team in ANSI C and present a modern Applications Programming Interface
(API) for C programmers, while allowing wrappers to be written for very
high level languages.

The library covers the following areas:

Complex Numbers Roots of Polynomials Special Functions
Vectors and Matrices Permutations Sorting BLAS Support
Linear Algebra Eigensystems Fast Fourier Transforms
Quadrature Random Numbers Quasi-Random Sequences Random
Distributions Statistics Histograms N-Tuples
Monte Carlo Integration Simulated Annealing Differential
Equations Interpolation Numerical Differentiation Chebyshev
Series Acceleration Approximation Discrete Hankel
Root-Finding Minimization Transforms Least-Squares Fitting
Physical Constants IEEE Floating-Point

hping is a command-line oriented TCP/IP packet assembler/analyzer.
The interface is inspired to the ping(8) unix command, but hping
isn't only able to send ICMP echo requests. It supports TCP, UDP,
ICMP and RAW-IP protocols, has a traceroute mode, the ability to
send files between a covered channel, and many other features.

The iODBC Driver Manager is a free implementation of the SAG CLI and
ODBC compliant driver manager which allows developers to write ODBC
compliant applications that can connect to various databases using
appropriate backend drivers.

JSON-C implements a reference counting object model that allows you to
easily construct JSON objects in C, output them as JSON formatted
strings and parse JSON formatted strings back into the C
representation of JSON objects.

Libbraille is a computer shared library which makes it possible to
easily develop for Braille displays. It provides a simple API to
write text on the display, directly draw dots, or get the value of
keys pressed on the Braille keyboard.

c-ares is a C library that performs DNS requests and name resolves
asynchronously. c-ares is a fork of the library named 'ares', written
by Greg Hudson at MIT.

libdiscid is a C library for creating MusicBrainz DiscIDs from audio
CDs. It reads a CD's table of contents (TOC) and generates an
identifier which can be used to lookup the CD at MusicBrainz.
Additionally, it provides a submission URL for adding the DiscID to the
database.

The interface of this library is new, but the DiscID algorithm and the
operating system dependent CD-ROM/DVD-ROM access code have been ported
from libmusicbrainz version 2. For more info about the interface read
the [WWW] API documentation.

libfreevec is a free (LGPL) library with hand-optimized replacement
routines for GLIBC, such as memcpy() and strlen(). These routines have
been written specifically to take advantage of the AltiVec unit
(Velocity Engine or VMX) and will only work on processors that include
this unit. This means they will not work on older processors, such as
603, 604, 750 (G3), or the POWER family of CPUs.

GNU Libidn is an implementation of the Stringprep, Punycode, and IDNA
specifications defined by the IETF Internationalized Domain Names (IDN)
working group. It is used to prepare internationalized strings (such as
domain name labels, usernames, and passwords) in order to increase the
likelihood that string input and string comparison work in ways that
make sense for typical users around the world. The library contains a
generic Stringprep implementation that does Unicode 3.2 NFKC
normalization, mapping and prohibition of characters, and bidirectional
character handling. Profiles for iSCSI, Kerberos 5, Nameprep, SASL, and
XMPP are included. Punycode and ASCII Compatible Encoding (ACE) via
IDNA is supported.

Library needed by programs that use the ltdl interface of GNU libtool.

Libmemcached is a C and C++ client library to the memcached server
(http://danga.com/memcached). It has been designed to be light on
memory usage, thread safe, and provide full access to server side
methods.

mowgli is a development framework for C (like GLib), which provides
high performance and highly flexible algorithms. It can be used as a
suppliment to GLib (to add additional functions (dictionaries,
hashes), or replace some of the slow GLib list manipulation
functions), or stand alone. It also provides a powerful hook system
and convenient logging for your code, as well as a high performance
block allocator

MusicBrainz is the second generation incarnation of the CD Index. This
server is designed to enable audio CD, MP3 and Vorbis players to
download metadata about the music they are playing.

Nettle is a cryptographic library that is designed to fit easily in more or
less any context: In crypto toolkits for object-oriented languages (C++,
Python, Pike, ...), in applications like LSH or GNUPG, or even in kernel space.

librsync implements the "rsync" algorithm, which allows remote
differencing of binary files. librsync computes a delta relative to a
file's checksum, so the two files need not both be present to generate
a delta.

The librtas shared library provides userspace with an interface through
which certain RTAS calls can be made. The library uses either of the
RTAS User Module or the RTAS system call to direct the kernel in making
these calls.

The librtasevent shared library provides users with a set of
definitions and common routines useful in parsing and dumping the
contents of RTAS events.

The libservicelgo package contains a library to create and maintain a
database for storing events related to system service. This database
allows for the logging of serviceable and informational events, and for
the logging of service procedures that have been performed upon the
system.

libssh2 is a library implementing the SSH2 protocol as defined by
Internet Drafts: SECSH-TRANS, SECSH-USERAUTH, SECSH-CONNECTION,
SECSH-ARCH, SECSH-FILEXFER, SECSH-DHGEX, SECSH-NUMBERS, and
SECSH-PUBLICKEY.