ColdFusion
ColdFusion is our application server of choice. We've been very
impressed with it's performance and speed of development. While ColdFusion
does have an associated cost, unlike some open source solutions,
we have found that the cost of the ColdFusion server is more than
made up for in reduced production time.
ColdFusion also has a great advantage in that it integrates near-seemlessly
with Adobe Flex and Adobe AIR. This makes ColdFusion an incredibly
powerful way to create software with very exciting properties.