A bunch of gear for WP developers in Japanese.
It is based on and translated from http://wpgear.org/.
The actual page: http://wpgear-ja.org/
To contribute you need a GitHub account.
The easy way: Click on index.md then click edit. This will automatically fork this project to your account, make your changes then submit a pull request.
Or if you want, clone it locally.
# how to clone locally
$ git clone git://github.com/your_username/your_fork.git
$ cd your_fork
# switch branches to default github hosted pages
$ git checkout -b gh-pages remotes/origin/gh-pages
# Edit index.md
$ git push
The license is: http://creativecommons.org/licenses/by/3.0/