This plugin is fantastic!! I don't even think most people are aware of it's potential. I use it specifically for conditionally adding scripts and/or styles to pages and posts... but there is SO MUCH MORE!!
Anyone needing to conditionally add a script or style to a certain page needs to grab this plugin!! The author is great.. and has kept it working with current versions of WordPress.
He is actively maintaining the plugin... and although I've never had to ask for support... I'm sure I would get an immediate response.
Need to add Adsense to a single page? This plugin can do it!!
Need to add a cool logobox.. but only want the CSS to be called on one page? This plugin can do it!!
I just can't say enough... Solid code; Reliable developer; and Actively maintained....
... what more do you need??