The following are open-source projects, whitepapers and experiements.

AS3 Peer-to-Peer Library

ActionScript/Flex library for making peer-to-peer connections using Adobe’s Stratus (beta) rendezvous service and the new peer-to-peer capabilities of Flash Player 10.

AIR Distribution Kit

The AIR Distribution Kit is an ActionScript 3 open-source library for creating update functionality within AIR applications and for creating custom browser-based install applications (badges).

AS3 Lightweight Remoting Framework

This project is motivated by the need for a simple yet robust framework for handling remoting calls. This framework could be used in AS3-only projects without the Flex framework, or it could be used in a Flex project to access remoting resources that aren’t supported by the Flex framework.