Qiita Comment Heatmapper is a Chrome extension developed by 17num. This free add-on falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. The program aims to enhance the comment sections on Qiita, a popular Japanese online community for programmers.

With Qiita Comment Heatmapper, users can enjoy two main features. Firstly, the extension allows for the customization of the comment footer section based on the number of LGTM (Looks Good to Me) received. Users can set different background colors for the comment footer based on the LGTM count, providing a visual representation of the comment's popularity.

Secondly, the extension offers the ability to sort the comment section on Qiita in two different ways: by LGTM count or by chronological order. This feature allows users to easily navigate through comments based on their preference, whether it be by popularity or time of posting.

Qiita Comment Heatmapper is a useful tool for Qiita users who want to enhance their commenting experience. With its customizable visual representation of comment popularity and sorting options, it provides a convenient way to interact with the comment sections on Qiita.