XLEFF is an XML layout Engine for Flash. The main function provided by XML layout engine is generating a component-based UI (user interface) by using an XML description written by you. Because of the XML layout engine, actionScript developer does not need to produce any code for generating the UI and can focus on the application logic producing business objects that simply use the UI dynamically created by the engine. You can get more detail information and download it in following URL. By the way XLEFF is an open source project.
Wrapper is a cross-browser compliant HTML/CSS rendering engine in ActionScript. It sits on top of your standards compliant HTML page. It is set up as a pre-compiled plug-in and can be integrated into any Flex or AIR applications easily even if an ActionScript framework for creation of compiled projects. If you are interested why not have a try now? You can see the demo and download it in following URL:
Ultraloader is a lightweight preloading library but very powerful. It groups loaded assets into ordered collections. Now the latest copy is Ultraloader 2.32. If you are interested, you can see the working example by the SWFSEOLite project since it uses the Ultraloader to load in its assets. More details please see the following URL: