Snoopy view-source bookmarklet for iPad, iPhone and other mobile devices

Snoopy is a bookmarklet for snooping on web pages [...] on mobile browsers (such as Mobile Safari on the iPad) where you can't view-source to poke around under the hood of sites to see how they're built. [...]

Using the bookmarklet will give you an overlay featuring information that Snoopy can 'sniff' out of the page, such as the doctype, what JS libraries are used in the page, what analytics, what font embedding technique is used, etc. It also gives you the ability to view the raw and/or generated source of the page.