Your user can log in to you site with Yahoo! JAPAN account. Buying license and… You can get annual support. 30 days refundable if it doesn’t work. NOTICE: This add on is providing just for backward compatibility. If you consider using Yahoo! JAPAN, please be patient till the day we release newer version. Actually, we have a plan for that.
A social plugin for WordPress.
This is a sample plugin. Created for testing gumroad integration.