Is audacity free?
What is latest version?
and what is the name of the jack I need to buy so I can plug my guitar into my computer? Thanks in advance
audacity is indeed free. The latest 'official' version is 1.2 i believe, but a 1.3 beta is currwntly available. However, I found that downloading plugins only worked on 1.2. You can plug your guitar into the mic jack or the line in and they should be already on your computer. To do this you need a 1/4" to 1/8" cable adaptor, which can be bought for $2 or so. If you have the extra money you could get a line 6 tone port or something like that which will be much more versatile.