Restlet Studio vs Sandbox: What are the differences?
Developers describe Restlet Studio as "The first browser-based IDE for APIs". Packaged as a Chrome extension and accessible from any modern web browser, Restlet Studio instantly provides to any developer powerful API crafting capabilities. Through an intuitive interface, developers can visually define all the elements of a web API, and automatically generate the client SDK and server skeleton of their API. On the other hand, Sandbox is detailed as "Quick and easy mock RESTful API and SOAP webservices". Quickly mock RESTful API or SOAP web-services with simple or dynamic responses, and fault injection to simulate real application behaviour.
Restlet Studio and Sandbox belong to "API Tools" category of the tech stack.
Sandbox is an open source tool with 161 GitHub stars and 28 GitHub forks. Here's a link to Sandbox's open source repository on GitHub.