Markdown for MeFi is a free Chrome add-on developed by Evan Dickinson. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. The program aims to simplify text formatting on MetaFilter.com by allowing users to utilize Markdown when writing comments and posts.

Markdown is a popular formatting language that provides a simpler alternative to HTML. With Markdown for MeFi, users can focus on their words rather than the intricacies of formatting. By using Markdown, users can easily create headings, lists, links, and other formatting elements without the need to manually write HTML tags.

It's worth noting that Markdown for MeFi is not an official product of MetaFilter.com but rather a convenient extension developed by Evan Dickinson. With this add-on, MetaFilter users can enhance their writing experience and make their contributions more visually appealing and organized.