KCron is an application for scheduling programs to run in the
background.  It is a graphical user interface to crontab and cron, the
Unix system scheduler.

Current features:
- Read/write crontab file
- Display natural language description, such as "At 10:00PM, every Sun"
- Display and edit environment variables and tasks
- Provide icons, toolbar, status bar, and resizing window
- Enable/disable environment variable or task
- Provide editing of all users' crontabs and system crontab for root
user
- Cut/copy/paste

Located in kdenonbeta/kcron.

See http://24.8.19.113/kcron.html for more information including
screenshots.