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Last week, we presented 10 Useful Web Application Interface Techniques , the first part of our review of useful design trends in modern Web applications.
Math is beautiful.
If You are creating and developing new web-sites regularly, You should think about template creation, collecting useful code snippets and things like that. You should do that to fasten development process, so I think You could use, change, optimize these template files to Your needs, however check out licence terms, if You use these for business purposes. However this is very generalize list for now, to clear out the best from the best sites.