Pretty pull-request viewer for GitHub is a Chrome add-on developed by nalliffunt. It is a free tool that falls under the category of Browsers, specifically Add-ons & Tools. This program provides users with a tree view of changed files in pull-requests on GitHub, with the added feature of highlighting unviewed changes. It supports both public and private repositories, making it a versatile tool for developers.

One of the key features of Pretty pull-request viewer is its smart grouping of nesting folders. This allows users to easily navigate through the changed files and understand the structure of the changes made in a pull-request. The tree view provides a clear visual representation of the changes, making it convenient for developers to review and understand the modifications made.

Overall, Pretty pull-request viewer for GitHub is a useful Chrome add-on for developers who frequently work with pull-requests on GitHub. Its tree view and highlighting features enhance the reviewing process, while the support for both public and private repositories adds to its versatility.