Here are some of the most popular VPN client websites:

A VPN client is a website or application that allows users to access websites or applications without being blocked by a VPN (Virtual Private Network). VPN clients typically provide secure, encrypted connections to websites, often with features like privacy settings, anonymity, and advanced security options.

1. OpenVPN (https://openvpn.org): A free and open-source VPN client that supports both client-side and server-side VPNs.

2. Tor (https://www.tor.org): A free, open-source VPN that provides anonymity and is often used for privacy purposes.

3. Bitsec VPN (https://www.bitsec.com): A free VPN that offers a range of features, including DNS-based encryption and traffic filtering.

4. VPN.com (https://www.vpn.com): A popular VPN provider that offers a variety of VPNs, including free ones.

5. Vpn Everywhere (https://www.vpn Everywhere.com): A free VPN client that supports a range of protocols.

6. Netnetch (https://www.netnetch.com): A free VPN provider that offers a range of features, including DNS-based encryption and traffic filtering.

7. Vpnmax (https://www.vpnmax.com): A free VPN client that provides a range of features, including DNS-based encryption and traffic filtering.

8. Vpn4real (https://www.vpn4real.com): A free VPN provider that offers a range of features, including DNS-based encryption and traffic filtering.

When using a VPN client, it's important to choose a reputable provider and make sure you're using a strong password to protect your internet connection. Also, remember to use a public Wi-Fi connection if possible, as private Wi-Fi can be a security risk.

If you have any specific questions about VPN clients or need help with a particular one, feel free to ask!