Free graphing software

I wasn't sure where else to put this...

I'm looking for free graphing software to generate graphs for my LOLPally guide (I'm looking to make it a 5-star!). The software must be able to do:

--Graph equations (duh)
--Take in plot points (need!), and do a connect-the-dot sort of thing
--Same thing as above, except find the best-fit-line for whatever equation format I specify (optional, since this obscure process requires matrices)
--Make graphs look nice!

Graphical Analysis has everything I'm looking for, but it's not free...

Try Winplot.

I've always used Graph. Easy and convenient for me at least.

Not sure how completely helpful it is, but check out Open Office suite, I heard it has something similar to that

I've always used Graph. Easy and convenient for me at least.

This software works great! Thanks!

 Ooh, product!

Lol, that's cool.

I use Mathematica, but it's far from free. I happened to get it for free, though~

Well, I'd say use that "Open Office" thing, use the spreadsheet processor in it.

you know what's free? http://docs.google.com