The Also Send To Slack Channel Checker is a free Chrome extension developed by Adam Pritchard. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools.

This extension aims to simplify the process of having Slack threads echoed to the channel by default. For those who prefer or need to have Slack threads sent to the channel, it can be frustrating to constantly remember to check the "also send to channel" checkbox. This extension solves that problem by automatically checking the box for you.

Additionally, the extension provides a helpful tip to hide the toolbar item in Chrome. By right-clicking on it and selecting "Hide in menu," users can declutter their browser interface.

Overall, the Also Send To Slack Channel Checker is a handy Chrome extension that streamlines the process of sending Slack threads to the channel.