Cheap or freeware circuit simulator programs?

[DrBwts]

Hi,

Anybody recommend any cheap (or preferably free ) circuit simulation software?

 

[BobK]

LTSPICE

Bob

 

[Raven Luni]

Sorry couldnt resist: http://circuitdiagram.net/electronic-birds-chirp-generator.html

 

[DrBwts]

Thanks for the links especially the bird churper