In the pursuit of finding a virtual breadboard, I found this extremely useful breadboard simulator, which you can use to implement circuits of your choice, and it lets you see how the actual circuit will look like.
That is, you make the connections on a breadboard, and it will show you its circuit diagram and how all the components are connected – very handy because you can get confused at times while connecting components on the board and can’t figure out what part is in series, in parallel or is it even connected or not!
The software is called Fritzing. Download it from HERE
The PSpice circuit simulation software can be downloaded from: HERE