Web based VPN

Right now we have a typical fat VPN client installed on laptops for people to get access to the network remotely. The software is buggy and always seems to not want to work when the person is on the other side of the world. So my question is, does anyone know if there is a web based VPN solution. Maybe a web portal that they can log into that will encrypt all traffic back to our network, like a VPN.

This would free us up from having to troubleshoot this and reinstall it when the person is away.

I am not talking about a citrix type solution, one that will allow a user to use their laptop, and all the apps on it, as well as get network drive access, as if they are sitting in the office.

Thanks in advance