I can't believe no-one has reviewed SPAN yet so here goes.

It is brilliant for several reasons:

1. It is free
2. It has a scalable GUI and goes quite big
3. It has a high level of zoom incase you really need to know if was 53hz or 57hz you were looking at!
4. It has a band-pass filter so you can hear the frequency band you are looking at (ctrl-click on PC)
5. You can have two curves on the same page (and it is free)
6. You can change the accuaracy speed etc. in more ways than many commercial plugs (it is based on the analyser in gliss eq)
7. It shows frequency and note information for wherever on the graph your mouse hovers (and it is free)

It is free and fully featured - it simply blows other free analysers away and is much more useful than many commercial or bundled analysers available today.

I can't believe it's free! Free!

If you haven't got it, why not get it now? If you only have version 1 get version 2 now it is sooo much better!