If you a person who takes presentations, then ZoomIt from Microsoft Sysinternals team is a free utility worth trying. ZoomIt is screen zoom and annotation tool for technical presentations that include application demonstrations. ZoomIt works from the system tray and you can activate it quickly using hot keys for zoom and also drawing on screen. ZoomIt works on all versions of Windows and you can use pen input for ZoomIt drawing on tablet PCs.
You can set your own keyboard shortcut to activate. Apart from this, you can type in your text on screen with your own font selected.
ZoomIt also includes a break timer feature that remains active even when you tab away from the timer window and allows you to return to the timer window by clicking on the ZoomIt tray icon.
ZoomIt is a very useful tool for all presentations and definitely worth trying.