Chris Taylor

If you run a WordPress MultiSite network where people can create their own blogs and choose a theme, it would be great to show off the available themes before people sign up. That’s always a been a bit hard to do, until now. This very simple plugin allows you to add a shortcode – [themebrowser] – to any post or page where you want the full list of enabled themes to show.
You can also paginate the themes by adding a “perpage” attribute to the shortcode, like this: [themebrowser perpage=”10″]
The list does not include themes that you have disabled in Site Admin. The details shown are the theme name, description and a screenshot (themes without a screenshot are also not included).

ThemeBrowser

Show off the themes available for blogs in your Wordpress MultiSite with a simple shortcode in any post or page.

Mark Barnes

You can add CSS to the entire website, regardless of what theme is being used, or add it to just the current theme. You can even add CSS that displays only when you are logged on – very useful when you’re playing with a new look, and it’s not quite ready for public viewing.
That’s it! There are no other options, everything is deliberately kept simple. Everything is stored in the database, so you don’t even have to worry about file permissions on your CSS files. Even better, all three styles are served in one external CSS file which is only loaded if you have actually made any tweaks – so no wasted HTTP requests.

Style Tweaker

Style Tweaker is a simple Wordpress plugin that allows you to tweak your site's CSS files to your heart's content.

ThemeBrowser vs Style Tweaker