| prune_all_forums | Prune all forums cron task. |
| prune_forum | Prune one forum cron task. |
| prune_notifications | Prune notifications cron task. |
| prune_shadow_topics | Prune one forum of its shadow topics cron task. |
| queue | Queue cron task. |
| tidy_cache | Tidy cache cron task. |
| tidy_plupload | Cron task for cleaning plupload's temporary upload directory. |
| tidy_search | Tidy search cron task. |
| tidy_sessions | Tidy sessions cron task. |
| tidy_warnings | Tidy warnings cron task. |
| update_hashes | Update old hashes to the current default hashing algorithm |