• Graphics Explorer -

http://kennethsutherland.com/flex/graphic_explorer/graphicExplorer.html

• Chart Sampler - 

http://demo.quietlyscheming.com/ChartSampler/app.html

• Custom Easing Function Explorer -

 http://www.madeinflex.com/img/entries/2007/05/customeasingexplorer.html

http://www.jamesward.com/easingFunctionFun/easingFunctionFun.html

• CSS Style Explorer -

http://examples.adobe.com/flex3/consulting/styleexplorer/Flex3StyleExplorer.html

• Filter Explorer (BlurFilter, GlowFilter etc) -

 http://merhl.com/flex2_samples/filterExplorer/

• Distortion effects (still nice, even though I’m trying to do the 3D stuff in flash 10, this was ahead of its time)

http://www.alex-uhlmann.de/flash/adobe/blog/distortionEffects/effectCube/

Others

These are ones I’ve seen but never had to use.

• Rounded, Enhanced button explorer

http://www.wabysabi.com/flex/enhancedbuttonskin/

• Reflection explorer

http://www.wietseveenstra.nl/files/flex/ReflectionExplorer/v1_0/ReflectionExplorer.html

• Perlin noise

http://www.bit-101.com/explorers/PerlinExplorer.swf

• Dual Slider

http://www.visualconcepts.ca/flex2/dualslider2/DualSlideTest.html

• Pixel Bender explorers

http://labs.adobe.com/technologies/flashplayer10/demos/pixelbender/
http://extjs.com/playpen/air/PixelBenderExplorer.air  (AIR application)

If you have any you’d like me to post, or if you know of any other good exlporers, let me know and I’ll add them into the list.