Wolfram+Alpha

A computational knowledge engine: it generates output by doing computations from its own internal knowledge base, instead of searching the web and returning links. The site provide a clear example of how Web 2.0 applications can facilitate data analysis and enable a variety of different types of analysis.
 * www.wolframalpha.com

Resources and links www.wolframalpha.com Articles and tutorials- http://blog.wolframalpha.com http://www.wolframalpha.com/participate/ http://community.wolframalpha.com SWOT analysis

Strengths:

 * Shows steps for numerical and algebra problems
 * Answer engine not search engine
 * Interact with output from search
 * Lots of support for blogs
 * Tailor reports to your needs
 * Will do Facebook report

Weaknesses:

 * Student use the site for "cheating" or to help with answers
 * Cost for use after trial period

Opportunities:

 * Great teaching aid
 * Probability research
 * Comparison of cities

**Threats**:
Google

Ideas: You can use Wolfram Alpha to generate a star chart specific to your location 