Slack-O-Meter is a free Chrome extension developed by sgtdck. It falls under the category of Browsers and is listed as an Add-ons & Tools subcategory. This extension aims to help users gain insight into their productivity by tracking the amount of time they spend on websites categorized as "slack domains."

With Slack-O-Meter, users can easily monitor how much time they are spending on non-productive websites. By marking certain domains as "slack domains," the extension keeps track of the time spent on these websites. It provides a daily report and allows users to change settings by simply clicking on the :-) icon.

Slack-O-Meter is a useful tool for individuals who want to improve their productivity by being aware of how much time they spend on distractions. With its simple interface and easy-to-use features, it provides a convenient way to track and manage online time.