This site uses Twitch's APIs to retrieve the Twitch schedules for streamers.
If you put your Twitch name in the Streamers I Follow page it will retrieve all the streamers you follow, then all of their schedules (this can take a couple of minutes sometimes).
If you want to see a schedule for only a certain set of streamers you can put their names in the Only Certain Streamers page. That will also give you a link that you can bookmark for later.
If you're retrieving a large number of schedules for streamers that haven't been queried recently it can take several minutes. If the Twitch API Rate Limit is hit then all requests will be paused for a minute or more.
This site will be open-sourced as soon as the backend code is less embarrassing to look at.