Springpad is a free notebook application that allows users to make notes and folders, save documents, links, photos, and other files, and create tasklisks. Springpad works on either a computer or via mobile apps, and allows users to save things while they surf the web.
The Springpad API allows developers to access and integrate Springpad functionality into other applications. Some example API methods include searching and retrieving user information, notes within a user notebook, bookmarks within the notebook, and lists within the notebook. The documentation provides a list of many other methods that the API provides.