If you need to destroy any data and eliminate any possibility of its restoration you need a "shredder". This software destroys the data you choose before the deletion, using a complicated procedure of filling the actual content with random data.
Powerbullet is a small, simple program for creating presentations in the Flash format. You should have minimal startup time in getting your first presentation together if you're familiar with using a basic word processor.
AIMP is an alternative media player to widely known and used Winamp. It is completely free, including additional tools like CD-ripper and sound recorder. The program also has support for custom skins and is plug-in friendly.