The following open-source libraries are used by ManicTime Server:
Autofac (http://code.google.com/p/autofac) - MIT License (http://www.opensource.org/licenses/mit-license.php)
Newtonsoft.Json (http://json.codeplex.com) - MIT License (http://json.codeplex.com/license)
protobuf-net (http://code.google.com/p/protobuf-net) - Apache License 2.0 (http://www.apache.org/licenses/LICENSE-2.0)