With Swÿp you can transfer any file from any app to any app on any device: simply with a swipe of a finger. Swÿp is a framework facilitating cross-app, cross-device data exchange using physical "swipe" gestures. Our framework allows any number of touch-sensing and collocated devices to establish file-exchange and communications with no pairing other than a physical gesture. With this inherent physical paradigm, users can immediately grasp the concepts behind device-to-device communications. Our prototypes application Postcards explore touch-enabled mobile devices connected to the LuminAR augmented surface interface. Postcards allows users to collaborate and create a digital postcards using Swÿp interactions. We demonstrate how Swÿp enabled interfaces can support new generation of interactive workspaces possible by allowing pair-free gesture-based communications to and from collocated devices.