I am looking out for storyboard widget for axure or powerpoint template which i want to create for a webapplication. Any link would be helpful.
For PowerPoint, I would recommend Keynotopia's templates, available here: http://keynotopia.com/web-prototyping/
For Axure, I would recommend Axutopia's templates, available here: http://axutopia.com/libraries/axure-web-widgets-library/
I included the web app ones specifically, but they have bundles if you prototype other types of apps. Both come with royalty-free, pixel-perfect widgets that can be used in production.