- boost (BSL)
- icu (UNICODE LICENSE V3)
- freetype (FTL)
- harfbuzz (MIT)
- hyphen (MPL)
- hunspell (MPL)
- gumbo (Apache-2.0)
- katana (MIT)
- cximage (CXIMAGE LICENCE)
- openjpeg (2-clause BSD License)
- socket.io-client-cpp (MIT)
- curl (CURL LICENCE)
- cryptopp (BSL)
- openssl (Apache-2.0)
- v8 (3-clause BSD License)
- brotli (MIT)
- cef (BSD 3-clause)
- glew (BSD/MIT)
- googletest (BSD 3-clause)
- ixwebsocket (BSD 3-clause)
- libheif (MIT)
- libde265 (LGPL-2.1-or-later)
- libvlc (LGPL-2.1-or-later)
- md4c (MIT)
- pole (BSD 3-clause)
- socketrocket (Apache-2.0)
- x265 (GPL-2.0-or-later)
- glm (MIT)
- mdds (MPL-2.0)
- librevenge (MPL-2.0)
- libodfgen (MPL-2.0)
- libetonyek (MPL-2.0)