HackMD TOC always is a free Chrome extension developed by TomoTomo. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This extension allows you to see the Table of Contents (TOC) even in edit or split-view mode on HackMD.

With HackMD TOC always, you can easily navigate through your document and access the TOC regardless of the editing or viewing mode you are in. Additionally, this extension adds a helpful button to the navigation bar for quick access to the TOC. These features work seamlessly even in the Edit mode of HackMD.

In the latest update, a modal dialog has been added to adjust the TOC, which can be opened from the navigation bar. This allows for more flexibility and customization in managing the Table of Contents.

Overall, HackMD TOC always is a handy Chrome extension for HackMD users who want to have easy access to the Table of Contents and enhance their editing and viewing experience.