Mathematics:
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Wolfram|Alpha
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Computer Algebra System (online)
http://www.wolframalpha.com/
A "computational knowledge engine". However, does a lot more than just math; see http://www.wolframalpha.com/examples/ for more examples. Does not require most questions to be formatted according to any particular syntax. For computations requiring multiple steps or more flexibility, try Maxima.
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| Maxima
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Computer Algebra System (download)
http://maxima.sourceforge.net/
Handles numeric and symbolic mathematical computations. Unlike W|A, requires some knowledge of syntax; many tutorials available. Work can easily be saved and loaded at a later time. The program wxMaxima is included and recommended for a nicely-formatted interface.
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| GeoGebra
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Geometry/Algebra/Spreadsheet (online & offline)
http://www.geogebra.org/cms/
Create interactive Euclidean geometry constructions or analytic (coordinate) geometry constructions; also creates interactive diagrams with Calculus content. Includes spreadsheet. Can be used through website or downloaded. |
| R
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Statistics Software (offline)
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MiKTeX |
Mathematical Typesetting (back-end) (offline) |
TeXMaker
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Mathematical Typesetting (front-end) (offline) |
| ScribTeX
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Mathematical Typesetting (online) |
MathJax
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Mathematical Typesetting (online) |
asciiSVG
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Mathematical Graphics (online & offline) |
LiveGraphics3D
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Mathematical Graphics (online and offline)
http://www.vis.uni-stuttgart.de/~kraus/LiveGraphics3D/
For an introduction to using this program, see this article; for an example of this program in action, see this webpage. |
Computer Science:
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Java
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Programming Language (online and download)
http://www.java.com/
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BlueJ
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Integrated Development Environment for Java (download)
http://bluej.org/ |
Notepad++
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Text Editor with Syntax Highlighting (download)
http://notepad-plus-plus.org/ |
IDEone
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Code Compiler and Storage (online)
http://www.ideone.com
An online compiler and debugging tool which allows you to compile and run code online in more than 40 programming languages; highlights syntax; code is automatically saved and a link is generated.
For example (Java):http://ideone.com/cE4RR
If you register an account, you can save your code. |
NetLogo
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Agent-Based Modeling Software (download)
http://ccl.northwestern.edu/netlogo/ |
AScape
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Agent-Based Modeling Toolkit (download)
http://ascape.sourceforge.net/
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Repast
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Agent-Based Modeling Toolkit (download)
http://repast.sourceforge.net/repast_3/index.html
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jMonkeyEngine
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Three-Dimensional Programming Toolkit (download)
http://www.jmonkeyengine.com/
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Additional Applications:
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Google
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OpenOffice
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GIMP
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Art of Illusion
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DropBox
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PortableApps
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USB Linux
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VirtuaWin
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Jing
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SWF to AVI
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Screenr
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Prezi
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FS Capture
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Screen Capture Tool (download)
http://www.aplusfreeware.com/categories/mmedia/FastStoneCapture.html |
Mindomo
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Mindmap Creator (online) |
Gliffy
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Flowchart Creator (online) |
| Jarnal |
Notetaker and PDF Annotator (download)
http://jarnal.wikispaces.com/
Write, sketch, or annotate a document using a stylus, mouse, or keyboard. (Particularly useful for stylus input.) Includes handwriting recognition. |
ImageJ
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Image Analysis (download)
http://rsbweb.nih.gov/ij/
Display, edit, and analyze image files. Calculate lengths, angles, and areas of selected regions; detect edges; count particles; perform geometric transformations. |
Audacity
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Sound Recorder and Editor (download)
http://audacity.sourceforge.net/
Free, open source software for recording and editing sound files. Create multi-track recordings, import and export various formats, add effects, change sample rates. |
LibraryThing
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Personal Book Catalog (online)
http://www.librarything.com
Organizes information about your personal book collection; provides a social network for book lovers. For example, to see what's on the shelves in my office:
http://www.librarything.com/catalog.php?view=stemkoski&shelf=shelf&sort=tags |
OnlineClock
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An Online Clock (online)
http://onlineclock.net/
A simple digital clock on a plain background; clock can be enlarged; convenient to have in the front of the classroom when students are taking exams. |
