NVDA Focus Highlight
GitHub (Since 2015-06):
https://github.com/nvdajp/focusHighlight
NVDA Community Add-ons page:
http://addons.nvda-project.org/addons/focusHighlight.en.html
Discussion in Japanese
http://sourceforge.jp/ticket/browse.php?group_id=4221&tid=31261
BitBucket:
https://bitbucket.org/nishimotz/focushighlight