you can try shade
http
/www.shadesandbox.com/
by the way, comodo free firewall has a strong sandbox. Not everyone knows this, but you can run your browser in comodo sandbox, even on your regular desktop, like you do with sandboxie. You don't have to use the comodo secure desktop.
But in terms of ease of use, you can't beat sandboxie. No other sandbox will let you drag and drop files from your desktop onto your browser, or give you such easy access to downloaded files.
ReHIPS has a very strong sandbox . If you ask nicely, they will let you join the closed beta, and give you a limited version of the program.
https
/forum.re-crypt.com/index.php?topic=2263.0