Twitgnostic is a free browser add-on developed by joelmccoy for Google Chrome. It falls under the category of Browsers, specifically Add-ons & Tools. Inspired by bengrosser's Facebook Demetricator, Twitgnostic aims to enhance privacy on Twitter by removing identifying characteristics from your timeline.

With Twitgnostic installed, usernames, avatars, and handles are hidden, allowing for a more anonymous browsing experience. The add-on also includes several updates, such as improved masked reply handling and the ability to make non-reply tweets with the extension on. Additionally, users can now reply to Gnosticized tweets and have references to other users made legible to others.

It's important to note that Twitgnostic is currently in beta/prototype release, and the developer, joelmccoy, encourages users to report any bugs or provide feature suggestions. Overall, Twitgnostic offers a unique solution for those seeking increased privacy while using Twitter.