Singe was made possible by a number of third-party software libraries
generously provided as open source by their respective authors.  Without
these tools, Singe would not exist.


arg_parser      BSD-2-Clause   http://savannah.nongnu.org/projects/arg-parser
binaryheap.lua  MIT            http://tieske.github.io/binaryheap.lua
bzip2           bzip2-1.0.6    https://sourceware.org/bzip2
copas           MIT            https://lunarmodules.github.io/copas
ffmpeg          LGPL-2.1       https://ffmpeg.org
ffms2           GPL-3.0-only   https://github.com/FFMS/ffms2
freetype        FTL            https://freetype.org
json.lua        MIT            https://github.com/rxi/json.lua
libarchive      BSD-2-Clause   https://libarchive.org
libjpeg-turbo   IJG            https://libjpeg-turbo.org
libogg          BSD-3-Clause   https://xiph.org/ogg
libpng          libpng-2.0     http://www.libpng.org
librs232        MIT            https://github.com/srdgame/librs232
libwebp         BSD-3-Clause   https://developers.google.com/speed/webp
libxmp          MIT            https://github.com/libxmp/libxmp
lua             MIT            https://www.lua.org
luafilesystem   MIT            https://lunarmodules.github.io/luafilesystem
luasec          MIT            https://github.com/lunarmodules/luasec
luasocket       MIT            https://lunarmodules.github.io/luasocket
manymouse       Zlib           https://icculus.org/manymouse
openssl         Apache-2.0     https://www.openssl.org
opus            BSD-3-Clause   https://opus-codec.org
opusfile        BSD-3-Clause   https://opus-codec.org
SDL2            Zlib           https://www.libsdl.org
SDL2_gfx        LGPL-2.1       https://github.com/ferzkopp/SDL_gfx
SDL2_image      Zlib           https://www.libsdl.org
SDL2_mixer      Zlib           https://www.libsdl.org
SDL2_ttf        Zlib           https://www.libsdl.org
timerwheel.lua  MIT            https://tieske.github.io/timerwheel.lua
uthash          BSD-1-Clause   https://troydhanson.github.io/uthash
vlc             GPL-2.0        https://www.videolan.org/vlc
wavpack         BSD-3-Clause   https://www.wavpack.com
xz              Public-Domain  https://github.com/tukaani-project/xz
zlib            Zlib           https://zlib.net
zstd            BSD-3-Clause   https://facebook.github.io/zstd


Fonts
-----

FreeSansBold    GPL-3.0 with font exception   https://www.gnu.org/software/freefont
BreatheFire     (design-time only:  text layer in singeLogo.xcf and indexing.xcf;
                 the font file is not shipped and its license is not recorded)