Michael Robertson has implemented couple of really cool web applications.
Paint/Visio (like), Word (like), Excel (like) and itunes (like) applications using Ajax and fire fox.
Now Michael Robertson is gearing toward a full blown OS in Ajax -> http://www.michaelrobertson.com/ajaxos/
Also here is a simple power point / visio like tool called “MxGraph” which uses canvas and vml to create presentation from your browser. -> take a look at in action http://www.jgraph.com/mxgraph/
Here is a JavaScript based UNIX shell created by “Norbert Landsteiner”. Check it out at http://www.masswerk.at/jsuix/ Its pretty neat lets you do all UNIX commands like creating fake files and using vi to edit them.



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