From author's site:

DeskTask connects to Microsoft Outlook and displays your calendar and task items on the desktop.

* Your tasks will always be visible, saving precious time to launch or switch to Outlook.
* Just minimize every window, and see what are the items due for today or tomorrow.
* DeskTask displays the whole week so you can be prepared to organize your work.
* Besides the calendar items, the Outlook to-do list (Folder Tasks) is also displayed. If you work with Outlook, DeskTask is for you

DeskTask is freeware. It can be freely used and distributed in commercial and private environments, provided the supplied Zip file is not in any way modified and there is no charge for it other than nominal handling fees.

Lookout is a free addin to Outlook that provides lightning-fast search for your e-mail, files, and desktop integrated with Microsoft Outlook™.

Built on top of a powerful search engine, Lookout is the only personal search engine that can search all of your e-mail from directly within Outlook - in seconds... Use Lookout to search, e-mail messages, contacts, calendar, notes, tasks, data from exchange, POP, IMAP, PST files, public folders, and files on your computer or other computers.

Minimize Outlook to the system tray. Show and hide Outlook by clicking the icon. Minimize to run an instance of Outlook in the system tray so you never miss e-mail alerts or reminders.