Shortcodes Pack is a handy but simple WordPress plugin which adds the following shortcodes for you to use:
[site-url] outputs the full site url.[theme-url] outputs the activated theme url.[admin-url] outputs the admin url.[login-url] outputs the login url.[logout-url] outputs the logout url.[youtube id='' width='' height='' align=''] outputs a YouTube video player.[snap url='' alt='' width='' height=''] outputs a snapshot of a webpage.[mailto]email@yourdomain.com[/mailto] outputs a obfuscated email address.[member]Example text[/member] outputs text which will only be displayed to registered users.[embedpdf width='' height='']http://example.com/file.pdf[/embedpdf][feedonly]Example text[/feedonly] outputs text which will only be displayed on your RSS feed. Handy for some RSS feed advertisements.[rss feed="http://example.com/feed" num="5"] outputs a RSS feed.