MarchingAntsSelect
From the site:
This is a simple ActionScript 3 implementation of the class marching ants selection marquee you find in applications such as Photoshop.
The class is based off this ActionScript 2 example here; http://www.nocircleno.com/experiments/selection_ants_proof/index.html, but adds in many more methods and is entirely self contained. Drawing the bitmaps for the marquee internally in the class.
Features
Either Fixed or user drawn marquee
Draggable or static fixed marque
Programatically changeable marquee colours
Programatically changeable marquee line thickness
Does not rely on library assets for marquee
http://www.blog.noponies.com/archives/80
TransformManager
Scale, rotate, and/or move any MovieClip on the stage using an intuitive interface (similar to most modern graphics applications like Photoshop and Illustrator). When the user clicks on the MovieClip, a selection box will be drawn around it along with four handles for scaling. When the user places their mouse just outside of any of the scaling handles, the cursor will change to indicate that they’re in rotation mode. Hold down shift to constrain scaling proportions or to limit rotation to 45 degree increments. VERY simple to implement. Easy to customize many properties like the handle size, selection color, whether to scale from the center or edges, etc. Unlike some other classes out there, this one does NOT require that the MovieClip’s registration point be in the center. Get the class and view a sample at http://www.greensock.com/ActionScript/TransformManager.