Peacekeeper supports scheduling and posting Twitter threads.

1. Go to the calendar page and click on 'Schedule new post'
2. Select a Twitter account
3. Fill in the caption. This will the first tweet of the thread.
4. Click on 'Comments' in the post dialog.
5. All 'Comments' you will add, will be added to the thread.
6. Click on 'Create' and then on 'Schedule'