Marketplace
A fair few icon packs are now free, including some that were previously free for a limited time:
Cosmo Rating 4.4
Sun Rating 4.4
Cyano Rating 4.1
Krypton Rating 4.3
Murky Rating 4.4
Fuxia Rating 4.3
ANTIMATTER - ICON PACK Rating 4.8
Phix Retro Rating 4.8
Iris UI Rating 4.7
Redox Rating 4.6
Thanks RewardBucks got 3 that I didn't have :)