newegg knocks a selection of anti-virus software to $0 via mail-in rebates. With free shipping, that's up to $65 off and yields several significant price lows. The sale includes anti-virus software, CD burning software, editing software, and more. Most rebates end November 29. Notable deals:

• Trend Micro Maximum Security 2013 3-User for PC / Mac (pictured) for $0 via $65 rebate
• KASPERSKY lab Internet Security 2013 3-User for PC for $0 via $55 rebate
• AVG Anti-Virus + PC TuneUp 2013 3-User for PC for $0 via $25 rebate
• See all $0 after rebate software