ClickToFlash 2.4.1 - Safari extension that prevents Flash content from loading automatically.. (Free): "ClickToFlash is a highly customizable extension that prevents Safari from launching the Flash plug-in automatically, resulting in faster browsing, reduced fan usage, and increased battery life. It replaces every Flash object by an unobtrusive placeholder that can be clicked to load the Flash content. Further, it can replace many Flash-based media players by Safari's native HTML5 media player.
- YouTube killer: fixed a typo introduced in 2.4 that prevented videos from loading when contained in certain types of playlists (thanks Ast A. Moore!)
- Mac OS X 10.5.8 or later
- Safari 5.0.6 or later
(Via MacUpdate - Mac OS X.)