Hi,
Although this is an expected question, I’m almost certain it’s going to unintentionally attract a lot of spam replies, so I decided to write a few general guidelines and then mark the topic as resolved. I hope this is fine.
Finding an exact replacement for any plugin is extremely difficult. However, provided that the WordPress API does not change soon, there is enough time to experiment with other plugins and find ways to replace the used functionality, since at the time of writing there are no major bugs.
As a starting point, I’d suggest to search the plugin repository for plugins that can replace the main functionality of this one, such as the generation of the description meta tag, Opengraph and Twitter Card meta tags and title tag customization. As far as I can tell, there are many plugins that at least have these features. In my opinion, you can’t go wrong by choosing any popular plugin.
The rest of the features of this plugin should be considered either experimental or incomplete or just a workaround, for example the schema.org generator, which is rather a workaround, as schema.org metadata should actually be added by WP’s template tags in order to do it right. Maybe you can find separate plugins for each one of those features or you could even easily implement the simple ones yourself according to your website’s specific needs by using the WP Custom Fields and adding a few lines of code in functions.php, which sometimes can save a lot of time in the long run.
I guess there is nothing more to add about this issue. I hope the above notes help.
