I’ve found a very interesting survey which presents the most used ASP.NET Ajax frameworks. The results can be found here. It seems that jquery and ASP.NET Ajax are the most used ajax frameworks.

The 4th place is taken by Telerik – which becomes the most commercial  ajax framework used. This proves that indeed the guys from Telerik are good. I wonder how the statistics would look like if jquery and ASP.NET ajax were not free

Product 2007 2009 diff
jQuery 13,3% 71,4% 58,1%
AJAX Control Toolkit 49,6% 58,8% 9,2%
ASP.NET Ajax 73,7% 44,8% -28,9%
Telerik radControls 11,7% 15,6% 3,9%
Ajax.NET Professional 13,3% 10,3% -3,0%
JSON.NET 3,3% 9,7% 6,4%
Raw Ajax 11,3% 8,6% -2,7%
Prototype 11,5% 8,3% -3,2%
Yahoo! UI 5,5% 7,0% 1,5%
Ext JS 6,1% 6,1% 0,0%
Script.aculo.us 9,7% 5,3% -4,4%

Florin RAICU