Hi,
What are the options for making public wifi connections more secure?
VPNs?
how do they work? is it like a proxy?
Vpn is the only safe way to use it sadly (mostly thanks to insufficient security on web sites/unsecured web mail etc.). Hence most av companies offer secure vpns as standard now.
What companies provide these services? I had a google, couldn't find anything
SSH tunnel to somewhere you trust perhaps?
Use a VPN if you want to tunnel everything...