* [C++ Standard Library](http://en.wikipedia.org/wiki/C%2B%2B_Standard_Library) - A collection of classes and functions, which are written in the core language and part of the C++ ISO Standard itself.
* [Standard Template Library](http://en.wikipedia.org/wiki/Standard_Template_Library) - The Standard Template Library (STL).
* [libPhenom](https://github.com/facebook/libphenom) - libPhenom is an eventing framework for building high performance and high scalability systems in C.
* [LibSourcey](https://github.com/sourcey/libsourcey) - C++11 evented IO for real-time video streaming and high performance networking applications.
* [LibU](https://github.com/koanlogic/libu) - A multiplatform utility library written in C.
* [Loki](http://loki-lib.sourceforge.net/) - A C++ library of designs, containing flexible implementations of common design patterns and idioms.
* [MiLi](https://code.google.com/p/mili/) - Minimal headers-only C++ Library.
* [openFrameworks](http://www.openframeworks.cc/) - An open source C++ toolkit for creative coding.
* [Qt](http://qt-project.org/) - A cross-platform application and UI framework.
* [Reason](http://code.google.com/p/reason/) - A cross platform framework designed to bring the ease of use of Java, .Net, or Python to developers who require the performance and strength of C++.
* [STXXL](http://stxxl.sourceforge.net/) - Standard Template Library for Extra Large Data Sets.
* [Ultimate++](http://www.ultimatepp.org/) - A C++ cross-platform rapid application development framework.
* [Windows Template Library](http://sourceforge.net/projects/wtl/) - A C++ library for developing Windows applications and UI components.
* [Yomm11](https://github.com/jll63/yomm11) - Open multi-methods for C++11.
* [Evolving Objects](http://eodev.sourceforge.net/) - A template-based, ANSI-C++ evolutionary computation library which helps you to write your own stochastic optimization algorithms insanely fast.
* [Neu](https://github.com/andrometa/neu) - A C++ 11 framework, collection of programming languages, and multipurpose software system designed for: the creation of artificial intelligence applications.
* [libev](http://libev.schmorp.de/) - A full-featured and high-performance event loop that is loosely modelled after libevent, but without its limitations and bugs.
* [libevent](http://libevent.org/) - An event notification library.
* [C++ B-tree](https://code.google.com/p/cpp-btree/) - A template library that implements ordered in-memory containers based on a B-tree data structure.
* [wxWidgets](http://wxwidgets.org/) - A C++ library that lets developers create applications for Windows, Mac OS X, Linux and other platforms with a single code base.
* [Qwt](http://qwt.sourceforge.net/) - Qt Widgets for Technical Applications.
* [QwtPlot3D](http://qwtplot3d.sourceforge.net/) - A feature-rich Qt/OpenGL-based C++ programming library, providing essentially a bunch of 3D-widgets.
## Graphics
* [Ogre 3D](http://www.ogre3d.org/) - One of the most popular open-source graphics rendering engines.
## Internationalization
* [IBM ICU](http://site.icu-project.org/) - A set of C/C++ and Java libraries providing Unicode and Globalization support.
* [gettext](http://www.gnu.org/software/gettext/) - GNU `gettext'.
* [POCO](http://pocoproject.org/) - C++ class libraries and frameworks for building network- and internet-based applications that run on desktop, server, mobile and embedded systems.
* [SDS](https://github.com/antirez/sds) - Simple Dynamic Strings library for C.
* [Simbody](https://github.com/simbody/simbody) - High-performance C++ multibody dynamics/physics library for simulating articulated biomechanical and mechanical systems like vehicles, robots, and the human skeleton.
* [The C++ Annotations](http://cppannotations.sourceforge.net/annotations/html/) - An in-depth guide on C++, intended for people with a good knowledge of C who want to make the transition to C++.
* [Awesome C Programming Tutorials in Hi Def [HD]](https://www.youtube.com/playlist?list=PLCB9F975ECF01953C) - A collection of detailed C Programming Language Tutorials for Beginners and New Programmers.
* [C++](https://www.youtube.com/playlist?list=PL2F919ADECA5E39A6) - by VoidRealms.
* [C++ Qt Programming](https://www.youtube.com/playlist?list=PL2D1942A4688E9D63) - by VoidRealms.
* [C++ Programming Tutorials Playlist](https://www.youtube.com/playlist?list=PLAE85DE8440AA6B83) - thenewboston Official Buckys C++ Programming Tutorials Playlist.
* [C++ Programming Tutorials from thenewboston](https://www.youtube.com/playlist?list=PLF541C2C1F671AEF6) - These are all of thenewboston's C++ programming tutorials.
* [C++ GUI with Qt Playlist](https://www.youtube.com/playlist?list=PLD0D54219E5F2544D) - Official Playlist for thenewboston C++ GUI with Qt tutorials.
* [C Programming Tutorials](https://www.youtube.com/playlist?list=PL78280D6BE6F05D34) - All of thenewboston's C programming tutorials are right here.
* [lists](https://github.com/jnv/lists) - List of (awesome) lists curated on GitHub
* [awesome-awesomeness](https://github.com/bayandin/awesome-awesomeness) - A curated list of awesome awesomeness.
* [awesome](https://github.com/sindresorhus/awesome) - A curated list of awesome lists.
* [free-programming-books](https://github.com/vhf/free-programming-books) - List of Freely Available Programming Books
* [papers-we-love](https://github.com/papers-we-love/papers-we-love) - Papers from the computer science community to read and discuss.
* [awesome-php](https://github.com/ziadoz/awesome-php) - Awesome PHP libraries, resources and shiny things.
* [awesome-python](https://github.com/vinta/awesome-python) - Awesome Python frameworks, libraries and software.
* [awesome-sysadmin](https://github.com/kahun/awesome-sysadmin) - Awesome open source sysadmin resources
* [awesome-talks](https://github.com/JanVanRyswyck/awesome-talks) - A lot of screencasts, recordings of user group gatherings and conference talks available online.
* [github-cheat-sheet](https://github.com/tiimgreen/github-cheat-sheet) - A list of cool features of Git and GitHub.
* [ToolsOfTheTrade](https://github.com/cjbarber/ToolsOfTheTrade) - Tools of The Trade, from Hacker News.
* [cheatsheets.org](http://www.cheatsheets.org/) - The largest collection of reference cards for developers.
* [cheat-sheets.org](http://www.cheat-sheets.org/) - All cheat sheets, round-ups, quick reference cards, quick reference guides and quick reference sheets in one page.
* [thefreecountry.com](http://www.thefreecountry.com/) - A collection of free programming resources, free webmasters' resources, free security resources and free utilities.