[iPhone App] Tabulator
Due to the way the iPhone is locked by Apple, adding functionality sometimes requires ingenious methods.
Tabulator is not really an application, but a set of javascript commands that can be saved as a bookmark. If you then load this bookmark while viewing a page on the iPhone, the javascript gets activated and can then add functionality to your browser. The bookmark has to be activated every time you desire the functionality.
What Tabulator does, is pop up a menu every time you click on a link, that offers you the ability to open a link, open it in a new tab, or flag it for later opening.
It is a nice and simple feature that is minimalist and does its job well.
In the following screenshot, I clicked on a link, and the Tabulator pop-up window appears offering my three options. Blue means 'open it in the same window', green means 'open in a new tab', and the last button is to mark the link for later opening.

Check out the official site for more info and instructions on how to install Tabulator.