Penguin-Link is a free Chrome extension developed by codingengine. This extension aims to protect users from fake or unwanted sites by detecting domain similarities based on user entries. By checking the domain similarities against an allowed list defined by the user, Penguin-Link alerts the user if there is a high similarity, helping them avoid potentially harmful websites.

It is important to note that Penguin-Link does not guarantee any level of security. As an experimental extension, it is advised to use it at your own risk. While Penguin-Link strives to provide a layer of protection against fake sites, users should exercise caution and rely on other security measures for comprehensive online safety.