- Project Home: https://curl.haxx.se/
- License: MIT/X Derivate License
- Caveats: some SSL libraries use GPL, make sure to select one that suits your needs
- Project Home: http://www.curlpp.org/
- GITHUB: https://github.com/jpbarrette/curlpp
- License: MIT License
- Project Home: https://github.com/arangodb/velocypack
- License: Apache 2 License
- Project Home: https://github.com/Cyan4973/xxHash/
- License: BSD License