Fry's Electronics offers a selection of software for $0 each, via the rebates listed below. With free shipping on most items (unless noted), each is at the lowest total price we could find by at least $13. The software, with applicable rebates:
For its newsletter subscribers only, Newegg offers the Malwarebytes Anti-Malware Pro 1-User for Windows, which also includes free lifetime updates, model no. 771028237401, for $29.99. Coupon code "EMCPHPC47" drops it to $14.99. With free shipping, that's the lowest total price we could find by $2, although we saw it for $4 less last week, since expired.