Moq (https://github.com/moq/moq4) - This is a mocking framework. Used here in unit tests to be able to mock dependencies and keep unit tests clear and readable.
Newtonsoft.Json (https://www.newtonsoft.com/json) - The most popular and high performant JSON framework for .NET. It's being used to serialize and deserialize movie request payloads and also to store cached data with akavache.