A host of companies have begun Apple-related Black Friday sales, such as Yazsoft, which is offering 40 percent off of Playback, ShareTool and Speed Download 5 for the Mac. iSkin is selling Mac, iPod and iPhone accessories for 50 percent off or more, with a particular emphasis on gear for older Apple platforms. DEVONtechnologies has posted a 25 percent discount on all of its software, including Infoworker bundles.