OpenConnect!

sshuttle: where transparent proxy meets VPN meets sshsshuttle is the only program that solves the following common case:

Shimo supports every major VPN protocol that is currently available: The widely used CiscoVPN, the very secure OpenVPN and all standard-compliant IPSec connections. It also handles Point-to-Point Tunneling (PPTP) and Layer 2 Tunneling (L2TP) protocols. Even Cisco’s new Secure Socket Layer (SSL) protocol AnyConnect is supported by Shimo – the most flexible VPN client for Mac. Shimo also enables you to establish encrypted Secure Shell (SSH) connections including port forwarding for secure web browsing. »

WireGuard is an extremely simple yet fast and modern VPN that utilizes state-of-the-art cryptography. It aims to be faster, simpler, leaner, and more useful than IPSec, while avoiding the massive headache. It intends to be considerably more performant than OpenVPN. WireGuard is designed as a general purpose VPN for running on embedded interfaces and super computers alike, fit for many different circumstances. Initially released for the Linux kernel, it plans to be cross-platform and widely deployable. It is currently under heavy development, but already it might be regarded as the most secure, easiest to use, and simplest VPN solution in the industry. »

Make the VPN experience simpler and more secure with the enhanced remote access technology of Cisco AnyConnect Secure Mobility Client. This software builds on prior Cisco AnyConnect VPN Client offerings to improve the always-on VPN experience across more laptop and smartphone-based mobile devices, including laptops using Microsoft Windows 7.

OpenConnect GUI is the graphical client of OpenConnect for Microsoft Windows systems (or any other system Qt and OpenConnect run on). OpenConnect is a VPN client that utilises TLS and DTLS for secure session establishment, and is compatible with the Cisco AnyConnect SSL VPN protocol.

The Shrew Soft VPN Client is a free IPsec Remote Access VPN Client for both Windows 2000, XP, Vista and Windows 7 operating systems ( x86 and amd64 versions ) and for FreeBSD, NetBSD and Linux based operating systems. It was originally developed to provide secure communications between mobile Windows hosts and open source VPN gateways that utilize standards compliant software such as ipsec-tools, OpenSWAN, FreeSWAN, StrongSWAN, isakmpd. It now offers many of the advanced features only found in expensive commercial software solutions and provides compatibility for VPN appliances produced by vendors such as Cisco, Juniper, Checkpoint, Fortinet, Netgear, Linksys, Zywall and many others.The Linux version supports most of the features availalble in the Windows VPN Client version with the exception of those which are not cross platform compatible. »

This simple tool finds free OpenVPN servers for you and allow you to download the OVPN config file. The extension is written on top of VPN Gate Academic Experiment Project that is an online service as an academic research at Graduate School of University of Tsukuba, Japan. The purpose of this research is to expand the knowledge of "Global Distributed Public VPN Relay Servers" .

Front End to VPNC, a command line VPN client for Cisco VPN hardware. This client is known to work on: Windows 2000, Windows XP, Windows 2003, Windows Vista, Windows 2008 and Windows 7. It supports both 32 bit (x86) and 64 bit (x64/x86_64).

Remote Access with TheGreenBow VPN ClientEnterprises need to have remote access to the company's applications and servers quickly, easily and securely. TheGreenBow VPN Client enables employees to work from home or on the road, and IT managers to connect in remote desktop sharing to the enterprise infrastructure. The VPN Client offers a range of features from simple authentication via simple login to advanced full PKI integration capabilities.Support of both IPsec and SSLSupport of IKEv1 and IKEv2Support of IPv4 and IPv6TheGreenBow VPN Client is available for Windows 10 32/64-bit. It can also be deployed on every Windows from Windows Vista to Windows 10, including Windows Server.25 languagesTheGreenBow provides the only Common Criteria Certified EAL3+ VPN Client in the world30 days of free evaluation »