How can i code some of photoshop tools in a website for the user to play with?

An example of what i want: http://ift.tt/1MYwjIz

looking to code some simple tools like a color picker, font picker, drag and drop logo/image or in general a very small environment for the user to design a flier or a business cards. i understand this might requires sets of skills but plz shoot me some ideas and languages that will enable you to create such tools in a website.

thanks.