- 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)