I work as an UX designer on several applications for hospitals. Our customer wants to see hi-fidelity mockups of the designs we create; the more detail the better, in order to validate with end-users properly. Especially animations/transitions are very well received.
Currently I am building my mock-ups in Adobe Flash. Oldskool -- but very strong.
What are good alternatives to Flash -- with similar (or better) capabilities?
The tools I am familiar with: HTML, Axure, Microsoft Blend (Silverlight), but these do not make me very happy.
Any more that you know of?