Anybody know of a good logic layout application?
I don't know exactly what to call this kind of application, but I'm looking for a good program that'll allow me to layout and test logical circuits. Something that has ands, ors, xors, nots, transistors, and all the basic logical components. Something kind of like UML except with basic electrical components. Something that could generate something like this:

![alt text][1]


  [1]: http://www.theseusresearch.com/images/NCLARTFIG27.gif
Anybody know of a good logic layout application?
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I don't know exactly what to call this kind of application, but I'm looking for a good program that'll allow me to layout and test logical circuits. Something that has ands, ors, xors, nots, transistors, and all the basic logical components. Something kind of like UML except with basic electrical components. Something that could generate something like this:

![alt text][1]


  [1]: http://www.theseusresearch.com/images/NCLARTFIG27.gif