Major software giveaway sites
Ghacks.net/
Bitsdujour
Download.hr
SOFTWARE AND GAME GIVEAWAYS
Giveaway Club
Giveaway of the Day
Shareware On Sale
Top Soft Bargains
Topware Sale
Windows Deal
These sites offer regular giveaways as well (some only infrequently)
Software giveaway sites are monetized in various ways. Some displays ads on their websites and earn revenue from that. Others may offer deals and discounts next to free offers, or offer to upgrade a program to a better version for a discounted price.