iPhone Drift is a free browser which lets you get the feel of iPhone browser which you can use to browse the internet just like in you do in real iPhone, it emulates the same interface as there in the safari browser on iPhone.
iPhone drift offers pixel accurate web browsing, so a webpage will be rendered same as it looks like in iPhone safari browser.
Moreover you cannot only browse with this iPhone emulator but can also watch youtube videos, find locations with google maps, rotate to change the view from portrait to landscape to get the real iPhone experience.
iPhone emulator shown above is completely portable tool, which is a small executable of 997 KB of size which you can take anywhere and run it simply by executing iPhone Drift.exe
Some More Pictures of iPhone Drift or iPhone Emulator are