Question: I'm looking for examples of designs where there is special logic that prevents a title, heading, or landmark from being moved out of view, so that the user doesn't lose their context.

Examples:

* Excel's "Freeze top row"
* iOS UITableView (notice the "A" subheading floats)

![enter image description here](https://i.stack.imgur.com/lR13O.png)

What are some other examples? I'm especially interested in examples that handle more complex situations than simple tables. For example, a graphical app where the user can scroll in a more freeform way, or where multiple headers can be floating at once.

Answer: 
Take a look at [biathlontime](http://biathlontime.com/2010-2011/world-cup/men/) — selected table rows stick to the top of the window.
**Gmail Application for Android**

The Gmail application for Android has these type of headers when viewing an email. The header changes as you scroll down based on what actions you can do with the message you are viewing (e.g. reply, forward, star).