MockMockWeb is a Heroku-ready Node.js-based Web application server which allows you to mock up a website in seconds. It allows you to instantly launch a website which sends an empty page (with status 200) to any request/URL and edit any page on the spot. You can also edit the layout shared throughout your website. It lets you build a mock (sometimes real) website in a request-driven interaction.
APIcaller is a class that helps you to build API wrappers. You don't have to worry about building URLs, or even about parsing the requested data. As an example, if an API requires an API key, you can set this key as a default value and it'll be always sent with the API request. The API needs to return the data in JSON format, otherwise an execption will be thrown.