# Popular required libraries

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- [Allegro](allegro.md) C, zlib, mature
- [Boost (C++ Libraries)](boost.md) C++, [BSL-1.0](https://github.com/boostorg/boost/blob/master/LICENSE_1_0.txt), mature
- [Crypto++](crypto.md) C++, Boost-1.0
- [FreeType](freetype.md) C, GPL, mature
- [HarfBuzz](harfbuzz.md) C++, MIT, mature
- [LZMA SDK](lzma.md) C, LGPL-2.0, mature
- [Libxml2](libxml2.md) C, MIT, mature
- [Lua](lua.md) C, MIT, mature
- [Open AL](openal.md) Proprietary since v1.1, LGPL before
- [Open AL Soft](openalsoft.md) C, LGPL-2.0
- [OpenSSL](openssl.md) C, [Dual licensed under special licenses](https://github.com/openssl/openssl/blob/master/LICENSE), mature
- [Pthreads-win32](pthreads_win32.md) C, LGPL-2.1, mature
- [Ragel](ragel.md) C++, MIT, mature
- [SWIG](swig.md) C++, [Special](https://raw.githubusercontent.com/swig/swig/master/LICENSE), mature
- [Simple DirectMedia Layer](sdl_2.md) zlib, mature
- [Simple and Fast Multimedia Library](sfml.md) C++, zlib (core), mature
- [XZ Utils](xz.md) C, Different, see file Copying, liblzma is public domain, mature
- [libpng](libpng.md) C, [libpng](https://sourceforge.net/p/libpng/code/ci/master/tree/LICENSE), mature
- [yaml-cpp](yaml_cpp.md) C++, MIT
- [zlib](zlib.md) C, zlib, mature

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