Viscosity 1.11.3 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The program lies within Internet & Network Tools, more precisely Network Tools. This PC program is suitable for 32-bit versions of Windows XP/Vista/7/8/10/11. The actual developer of the software is SparkLabs. The most popular versions of the program 1.8, 1.7 and 1.6. The Viscosity installer is commonly called Viscosity.exe.
From the developer:
Viscosity is a first class VPN client, providing everything you need to establish fast and secure OpenVPN connections on both macOS and Windows.
Viscosity caters to both users new to VPNs and experts alike, providing secure and reliable VPN connections. Whether remotely connecting to your workplace network, home network, VPN Service Provider, or other setup, Viscosity ensures it's done with ease and style.
You may want to check out more software, such as Anton Paar - VisioLab for AMVn, Luxand Wave FX or iUnit, which might be similar to Viscosity.