Here are permanent links to popular downloads. Check out the Online Demos page for more examples and downloads.
Elliptical arc for arbitrarily rotated ellipse – post and download link here.
File Upload with ASP.NET – A simple example illustrating how to use a .net web handler for file upload in a Flex app.
Spline Tangent - Interactive demo shows how to calculate the tangent to a Catmull-Rom spline and display a segment of that tangent.
AS 2 Wedge Class (draws pie-shaped wedges)
From the old Singularity blog,
AS 2 Pascal’s Triangle (forward and reverse recursion)
AS 2 Timer Class (choreograph events in timed sequence)
AS 2 Pair and Triple classes – STL-style pair and triple used for coordinates. Includes great-circle distance.
AS 2 – The magic of the number 1089.