As you can see in the chart, Adobe Flex tops the list with a substantial margin. Having messed a bit with Flex, this is not overly surprising. Curl being in second place is not surprising either. Many of you might think that Silverlight should be higher. Right now it isn't. It would, however, be interesting to see where Silverlight places on a similar chart in about two years. Adobe has their work cut out for them if they want to stay ahead of Microsoft!
If you've used Flex, Curl or Google Gears, then comment on how you liked, or disliked, them!