With this free utility (for Mac OS X only), making screenshots of webpages has never been so easy and quick.

IZArc is a free archive software which can replace entirely a commercial software like WinZip as it supports most of the archive formats.

Metapad is a fast and completely freeware text editor for Windows with has similar features to Microsoft Notepad but with many extra and useful features.

Here is a good tutorial to discover Google Earth and Google Sketchup, and how these two freewares work together.

This free antiviral program provides all that you need to protect your computer, including a tool for scanning your hard drive and a real-time shield (the AVG Resident Shield) to prevent infections