Turbosquid.com – A huge collection of 3D models (a small portion of which are available for free).
BadKing.com’s Model Library – an impressive collection of ZBrush models, including many free models.
Free3D.com – A huge collection of 3D models. Seems like they have more free ZBrush ones than Turbosquid.
CGTrader.com – a huge collection of 3D models, similar to Turbosquid and Free3D.
Hum3D.com – a collection of 3D models. Seems to lack the filtering options websites like Turbosquid have.
Yeggi.com – contains about 2,000 printable ZBrush models.
3DExport.com – a huge collection of 3D models.
ZBrush Central’s Default Free Zbrush ZTL / Model Thread – a collection of free ZBrush tools by the ZBrush Central community.
Free Gladiator Model – an impressive model accompanied with pictures and ideas for possible uses.
http://Nick Zuccarello’s muscular human male model – a free model of a muscular human male that took Nick 3 years of on and off work to create.
Zbrushguides.com’s tools – a collection of tools including a multi-eye insert tool and a peacock feather tool.
3rd Eye Blind – a detailed model of an alien, including pictures and explanations.
Want your tools added to this list for free? Contact me.