* FlashToHTML5 (3.2) – Free – PowerPC Friendly 10.5 Leopard. It is a Safari extension that replaces the standard YouTube Flash Player with an HTML5 player. Download Here.
* Youtube5 – PowerPC Friendly – Free – Leopard 10.5 – It removes the need to use flash on YouTube by converting all videos to their HTML5 video tag equivalents. It also has the added benefits of decreased CPU usage compared to flash, and the removal of in-video ads. Download Here
Soundflower is a OS X system extension that allows applications to pass audio to other applications. It is easy to use, it simply presents itself as an audio device, allowing any audio application to send and receive audio.