Online Video Tutorials
OpenOffice.org is both an open-source product and a project. The product is a multi-platform office productivity suite. It includes desktop applications such as a word processor, a spreadsheet program, a presentation manager, and a drawing program, with a user interface and feature set similar to those of other office suites.
Thunderbird makes e-mailing safer, faster, and easier with such features as intelligent spam filters, a built-in RSS reader, and quick search. Thunderbird was designed to prevent viruses and to stop junk mail so you can get back to reading your mail.
Document Creation and Readers
Create PDF using PrimoPDF - a free tool for high-quality conversion to PDF, comprising a user-friendly interface that enables printing to PDF from virtually any Windows application.
Adobe Reader lets you read and print from any system any document created as an Adobe Portable Document Format (PDF) file, with its original appearance preserved.
Web Browsers and Plug-ins
Mozilla Firefox is a fast, full-featured Web browser. Firefox includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows you more of the page than any other browser and a number of additional features that work with you to help you get the most out of your time online.
Paint.NET is free image and photo editing software. It features an intuitive and innovative user interface with support for layers, unlimited undo, special effects, and a wide variety of useful and powerful tools. An active and growing online community provides friendly help, tutorials, and plug-ins.
GIMP (GNU Image Manipulation Program) is a freely distributed piece of software suitable for such tasks as photo retouching, image composition, and image authoring.
Inkscape is an Open Source vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.
Audacity® is free, open source software for recording and editing sounds. This editor can record and play sounds and import and export WAV, AIFF, MP3, and OGG files. Edit your sounds using cut, copy, and paste features (with unlimited undo functionality), mix tracks, or apply effects to your recordings.
Web Publishing and Computer Programming
Visual Web Developer is a tool for creating and working with ASP.NET Web applications (called simply "Web sites") in a variety of configurations.
WordPress is a personal publishing platform with a focus on aesthetics, Web standards, and usability. WordPress was born out of a desire for an elegant, well-structured personal publishing system built on PHP and MySQL and licensed under the GPL.
Computer Security and Maintenance
CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space.
SyncToy 2.1 is a free application that synchronizes files and folders between locations. Typical uses include sharing files, such as photos, with other computers and creating backup copies of files and folders.
AVG Free provides you with basic antivirus and anti-spyware protection for Windows and is available to download for free.
Malwarebytes has developed a variety of tools that can identify and remove malicious software from your computer. When your computer becomes infected, Malwarebytes can provide the needed assistance to remove the infection and restore the machine back to optimum performance.
Belarc Advisor builds a detailed profile of your installed software and hardware, including Microsoft Hotfixes and software serial numbers, and shows the results in your Web browser.
DreamCalc Graphing Edition is a calculator with scientific and graphing capabilities. It offers three different views (Simple Calculator, Scientific Standard, Scientific Base-N) to handle all of your math needs.
(The Graphing Edition is an unlimited trial version that will remind you purchase every time you use it.)
Easy-to-use 3D grapher that plots high quality graphs for 2D and 3D functions and coordinates tables. Graphing equations is as easy as typing them down. Both Cartesian and polar coordinates are supported as well as parametric equations and inequalities.
Astronomy and Space Sciences
Distant Suns 6-Special Edition is a fully functional desktop planetarium, showing the riches of the evening sky from anywhere on the earth or out into the solar-system.
WorldWide Telescope (WWT) enables your computer to function as a virtual telescope, bringing together imagery from the best ground and space-based telescopes in the world. Experience narrated guided tours from astronomers and educators featuring interesting places in the sky.
ACD/ChemSketch Freeware is a popular and comprehensive chemical drawing package, intended for home and educational use only.
Google Earth puts a planet's worth of imagery and other geographic information right on your desktop. View exotic locales like Maui and Paris, as well as points of interest such as local restaurants, hospitals, and schools.
Zoom and spin your way around the globe while viewing earthquakes in 3D. Adjust and customize the display to see earthquakes in a variety of different ways. Filter earthquakes by size and time - then select from many options that include quake indicators and map references. Earthquakes are shown in near real-time using the latest data from the USGS via the Internet.
Engineering, Physics, and General Science
Unit Converter is a freeware tool that can take care of all your unit conversions even when offline. It has an easy-to-use interface and contains most of the units commonly encountered while solving engineering problems. With more than 900 units, you are likely to find the units you are looking for.