Add a link to wiki page and sister projects.

README.markdown

@@ -1,3 +1,8 @@
+**Flying Focus**
+ · [Focus Snail](//github.com/NV/focus-snail/)
+ · [Focus Zoom](//github.com/NV/focus-zoom/)
+ · [Focus Hug](//github.com/NV/focus-hug/)
+
 # [Focus Transition](http://n12v.com/focus-transition/)
 
 ![Flying Focus icon](http://nv.github.io/flying-focus/chrome/icon_128.png)
@@ -21,3 +26,5 @@ No build step required; just load it as an unpacked extension from `chrome/`.
 * [TAB focus navigation doesn't show focus rings for buttons](https://code.google.com/p/chromium/issues/detail?id=321937) in Chrome
 * Impossible to change outline CSS property of some form elements [Chrome](https://code.google.com/p/chromium/issues/detail?id=323003) [WebKit](https://bugs.webkit.org/show_bug.cgi?id=124816)
 * No way to hide focus outline in Firefox, none of the methods [mentioned on StackOverflow](http://stackoverflow.com/questions/71074/how-to-remove-firefoxs-dotted-outline-on-buttons-as-well-as-links) work
+
+## [Who uses Flying Focus](https://github.com/NV/flying-focus/wiki/In-the-Wild)