x11-misc/
skippy

A full-screen task-switcher providing Apple Expose-like functionality

http://thegraveyard.org/skippy.php

There are no pull requests

You think something is missing here?
Start with filling a new pull requests.

If you also like to help the Gentoo project, you can consider sending a Pull Request via GitHub.
Before doing so, you might want to take a look at the wiki page.