I oftenly secretly use this website called Whoer.Net at schools to bypass the iBoss filters with the web proxy they provide. They have a VPN option I don't know much about it nor have I ever used Whoers VPN or any VPN of the short anyway so I cannot say I know what they have to offer but I do think you have to pay for it. I don't know if this is what your looking for I'm assuming this is for websites. I'm not sure and I honestly don't know much about it but whoer has a good webproxy to bypass school web filters so I assume it has good other stuff