Show selected users who have recently been active on reddit.
This program allows you to see if a user has had activity on reddit in a configurable time window.
Right click on the reddit alien to the right of the address bar and choose Options. Here you can create a list of users that you'd like to know are online. Just enter the reddit user name, no /u/ prefix or anything. Then enter how many minutes back you want to watch for. For example, if you enter 30 here, you will be notified if any of the users on your list has been active in the past 30 minutes.
During operation, if anyone on your user list posts or comments, the little reddit guy will show a green banner with a number indicating many users have been seen. Clicking the reddit guy shows you names and how long ago they were seen. From here you can click the user name and be taken to their page to see the recent activity. Note: You do not have to be logged in to reddit, or even have reddit open anywhere for this to work.