I have been collecting all the “flex explorers” from time to time as they are rolled out. The Flex explorers have been really really handy when it comes to checking for some stuff which you are not sure whether is possible. Without the style explorer, we would have been completely lost! From a styling perspective, the api documentation seems a little complex for a designer to get an idea of how go about styling a component on screen.
On many occasions when I have an idea, instead of reading through the api docs, I just checkout the explorers to see if it is possible in flex. As for stuff like effects, filters etc., I have found it impossible to figure it out from the api docs.
Over the past months, we have seen many explorers being released by adobe and other developers around the world. I have consolidated them under the FLEX EXPLORERS heading on the right side (below the Flex Components section). Check it out. If I have missed out anything, do drop a comment 
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Flex EnhancedButtonSkin Explorer…
http://www.wabysabi.com/flex/enhancedbuttonskin/
Flex 2 charting:
http://demo.quietlyscheming.com/ChartSampler/app.html
http://www.maclema.com/content/sek/
Flex style explore with kuler swatch import … very very cool!!
Thanks folk… I have added these to the list
… Keep it coming 
…
http://www.wabysabi.com/flex/enhancedbuttonskin/
Enhanced ButtonSkin Explorer
I have added the Enhanced Button as a component
Effects explorers link is dead.
Hi friends check this.. http://flexbox.mrinalwadhwa.com/
From the list
“Flex Explorers” 2 Explorers are gone offline:
a) Flex2PrimitiveExplorer
b) Effects Explorer
Hey, I actually think I have something to contribute?!?! Well. actually I’m not contributing anything at all–but check this out.
http://www.adobe.com/cfusion/exchange/index.cfm?event=extensionDetail&extid=1204518
I’m surprised I don’t see it listed. It was one of the first Fles “anythings” I found. (I’d never heard of Flex before Nov. `07)
Anyway, it’s an explorer for easing functions.
Effects Explorer is not working – can you please update the link.
Cheers
~k
http://swflair.blogspot.com/search/label/Flex%20Explorers