The Dropbox Node.js SDK by Brock Whitten provides developers access to Dropbox for integration with other applications and devices. Dropbox is a file storage, sharing, and synching service that allows users to store, share, and sync their files.
Twilio recently announced a developer preview for its new Twilio Sync offering. Twilio Sync maintains a single state synchronization infrastructure in the cloud that third party developers can utilize to introduce real-time synching and collaboration functionality into their apps.
SmartFile, a leading FTP and file sharing solutions provider, has released "SmartFile for Developers", described by SmartFile as "the World’s First Developer Centric PaaS for Files." SmartFile for Developers is a file management platform-as-a-service (PaaS) that allows developers to integrate web, smartphone and internal applications using the SmartFile API.