Amazon cuts $15 off a selection of software downloads for Windows and Mac via coupon code "MACR0913". (Note that video games are excluded.) Plus, it stacks with existing discounts of up to 87% off, making several titles free. That's the first dollar-off coupon we've seen on software from Amazon. Deal ends October 6. Some best bets, with prices after the above coupon:

• Corel AfterShot Pro for Mac for free
• Crayola Art Studio for PC for free
• WinZip for Mac (pictured) for free
• Typing Quick and Easy V17 for PC for free
• Total Training for Adobe Fireworks CS5 for PC for free
• Norton Antivirus 2013 for PC for $3.11
• Norton Internet Security for Mac for $3.24
• browse for more eligible software downloads at Amazon