While perusing the ever important osflash.org in preparation for some upcoming flash work, I came across some really great open source flash projects I thought might be interesting to some.

• movie masher
  
  Facilitates easy navigation of video, audio and image assets as well as effects, transitions and themes. Media can simply be dragged into the timeline for inclusion in a mash.
• swf address
  
  A small, but powerful library that provides deep linking for Flash and Ajax
• ajax animator
  
  Ajax Animator is a free open source web based flash ide designed for simplicity and community effort.

The only issue I have with osflash is that a lot of the projects are out-dated and not removed or tagged as being so, and it can become difficult to figure out if it is still applicable.