There is also a Javascript version of a Quadratic Equation Solver posted here:
Quadratic Equation Calculator
Since it is written in Javascript, the file can also be saved and used offline, if you are interested.
Well I am currently expanding the tool to more than just a quadratic solver.
If anyone has any ideas, or is willing to help with the programming, then post it here or contact me, and let's make this a joint operation
(By the way, where the heck are the math tags and smileys? )
What kind of a tool are you planning to turn it into?
I might be interested in helping with it.
Some of the existing industrial-strength root-finders for high-order equations already do that; it should just be a matter of extracting that particular code block.