jorgecasar

If you have the capacity of “edit_themes” you can see a Try Theme, a new option in Design menu.
In this page you see a form that let you choose a theme and it will be activated while you’re login in.

Try theme to develop

This plugin detect if current user have the capacity of "edit_themes" and then he can change the template to develop it.

yousan

Are you tired to create pages through different environments?
<ul>
<li>Add Virtual WordPress ‘page’ from php template file automatically</li>
<li>
Not needed to add ‘page’ from admin panel
The page-xxx.php would be located at ‘themes/your-theme/page-foobar.php’ then the page will be created as ‘http://www.example.com/foobar/’ without admin panel.
</li>
</ul>

Add Page From Template

Are you tired to create pages through different environments?

Try theme to develop vs Add Page From Template