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. The version column is the release vendored under thirdparty/ (or, for the libraries bundled inside the SDL trees and the host tools, the copy those trees carry). Projects without releases are listed by snapshot date. arg_parser 1.21 BSD-2-Clause http://savannah.nongnu.org/projects/arg-parser basis_universal 2.50 Apache-2.0 https://github.com/BinomialLLC/basis_universal binaryheap.lua 0.4 MIT http://tieske.github.io/binaryheap.lua brotli 1.2.0 MIT https://github.com/google/brotli bump.lua 3.1.7 MIT https://github.com/kikito/bump.lua cgltf 1.15 MIT https://github.com/jkuhlmann/cgltf copas 4.12.0 MIT https://lunarmodules.github.io/copas dav1d 1.5.4 BSD-2-Clause https://code.videolan.org/videolan/dav1d DirectXShaderCompiler 1.10.2605.37 NCSA https://github.com/microsoft/DirectXShaderCompiler (prebuilt, downloaded at build time; host tool only) ffmpeg 9.0.1 LGPL-2.1 https://ffmpeg.org freetype 2.13.2 FTL https://freetype.org (bundled with SDL3_ttf) game-music-emu 0.6.6 LGPL-2.1 https://github.com/libgme/game-music-emu (bundled with SDL3_mixer) harfbuzz 14.4.0 MIT https://harfbuzz.github.io (bundled with SDL3_ttf) highway 1.4.0 Apache-2.0 https://github.com/google/highway (bundled with libjxl) inspect.lua 3.1.0 MIT https://github.com/kikito/inspect.lua JoltPhysics 5.6.0 MIT https://github.com/jrouwe/JoltPhysics json.lua 0.1.2 MIT https://github.com/rxi/json.lua libjpeg 9f IJG https://ijg.org (bundled with SDL3_image) libjxl 0.7.3-SDL BSD-3-Clause https://github.com/libsdl-org/libjxl (bundled with SDL3_image) libogg 1.3.5 BSD-3-Clause https://xiph.org/ogg (bundled with SDL3_mixer) libpng 1.6.58 libpng-2.0 http://www.libpng.org (bundled with SDL3_image) librs232 1.0.4 MIT https://github.com/srdgame/librs232 libwebp 1.3.2 BSD-3-Clause https://developers.google.com/speed/webp (bundled with SDL3_image) libxmp 4.7.0 MIT https://github.com/libxmp/libxmp (bundled with SDL3_mixer) lsqlite3 0.9.7 MIT http://lua.sqlite.org lua 5.4.9 MIT https://www.lua.org luafilesystem 1.9.0 MIT https://lunarmodules.github.io/luafilesystem luasec 1.3.2 MIT https://github.com/lunarmodules/luasec luasocket 3.1.0 MIT https://lunarmodules.github.io/luasocket lume 2.3.0 MIT https://github.com/rxi/lume manymouse 0.0.3 Zlib https://icculus.org/manymouse middleclass 4.1.1 MIT https://github.com/kikito/middleclass openssl 3.5.8 Apache-2.0 https://www.openssl.org opus 1.4 BSD-3-Clause https://opus-codec.org (bundled with SDL3_mixer) opusfile 0.12 BSD-3-Clause https://opus-codec.org (bundled with SDL3_mixer) plutosvg 0.0.8 MIT https://github.com/sammycage/plutosvg (bundled with SDL3_ttf) plutovg 1.3.3 MIT https://github.com/sammycage/plutovg (bundled with SDL3_ttf) recastnavigation 1.6.0 Zlib https://github.com/recastnavigation/recastnavigation RmlUi 6.3 MIT https://github.com/mikke89/RmlUi SDL3 3.4.16 Zlib https://www.libsdl.org SDL3_image 3.4.6 Zlib https://www.libsdl.org SDL3_mixer 3.2.4 Zlib https://www.libsdl.org SDL3_ttf 3.2.2 Zlib https://www.libsdl.org SDL_shadercross main 2026-09 Zlib https://github.com/libsdl-org/SDL_shadercross (host tool only) skcms 0.7.3-SDL BSD-3-Clause https://skia.googlesource.com/skcms (bundled with libjxl) SPIRV-Cross main 2026-09 Apache-2.0 https://github.com/KhronosGroup/SPIRV-Cross (host tool only) sqlite 3.53.4 Public-Domain https://sqlite.org timerwheel.lua 1.0.2 MIT https://tieske.github.io/timerwheel.lua TinySoundFont 2026-07-19 MIT https://github.com/schellingb/TinySoundFont uthash 2.4.0 BSD-1-Clause https://troydhanson.github.io/uthash vlc 3.0 headers LGPL-2.1 https://www.videolan.org/vlc (two language-code headers only) wavpack 5.9.0 BSD-3-Clause https://www.wavpack.com (bundled with SDL3_mixer) zlib 1.3.2 Zlib https://zlib.net zstd 1.5.7 BSD-3-Clause https://facebook.github.io/zstd Fonts ----- FreeSansBold GPL-3.0 with font exception https://www.gnu.org/software/freefont Data ---- Mozilla CA list 20260601 (Debian ca-certificates) MPL-2.0 https://wiki.mozilla.org/CA (assets/cacerts.pem)