There are many scheduled jobs running in WordPress by default, and many jobs are added by plugins. All these jobs are better known as cron from the Linux scheduling process. But, WordPress offers no control for this.
You can use functions to manipulate scheduled jobs, but that requires a lot of work to do it right. With GD Press Tools Pro, you will get a new panel called Cron Scheduler. This panel shows list of all currently scheduled jobs (recurring or singe run).
For each job you can see all important information about next run, interval or hook name. And you will get 4 options for each one, as displayed on the image. First button will remove all scheduled jobs for the same hook regardless of their run time. Second will remove only selected instance of the hook. Third, green button, will attempt to run the job based on the parameters saved with the job. And last one is the preview of the arguments attached to the job.