#2 SPServices – This jQuery plugin is a must have for SharePoint developers. It works for SharePoint 2007, 2010, 2013, and Office 365. Data access is so much easier with this plugin! And now there is a Visual Studio Intellisense file for SPServices!
SPServices is a jQuery library which abstracts SharePoint’s Web Services and makes them easier to use. It also includes functions which use the various Web Service operations to provide more useful (and cool) capabilities. It works entirely client side and requires no server install.
#3 jqPlot – Whether you need to replace the missing Chart Web Part or you want an easy to use charting jQuery plugin, this is the library for you.
#4 DataTables – And finally, this jQuery plugin (notice a trend?) is awesome for showing data in a table with tons of great features. Really enhances the functionality of the .NET tables or stands alone as a beautiful addition.