Free graphing software

[KajitiSouls]

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...

[FallenMemory]

Try Winplot.

[Nikkey]

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

[Meeks]

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

[KajitiSouls]

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

This software works great! Thanks!

http://img291.imageshack.us/img291/8527/monsterhpexpratiosmx0.png

[Russt]

Lol, that's cool.

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

[ZachAttack]

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

[XTOTHEL]

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