Pro tools!!! Its heavly used by almost everyone lol. The software only works with the hardware. Its by a company called DigiDesign. One of the moderatly priced home systems I can recomend is the Digi 002. The mixer itself runs to about $2500 and comes with the pro tools software. There are some cool videos of the hardware on the pro tools' website. Check out www.protools.com
for more stuff about the software and hardware. This software is simple to use, fast, and I've seen it make some pretty crappy bands sound good
! My friend owns a studio and he use to run everything off a standard mixing board and then through pro tools, but now he just runs everything right though pro tools.
Some other affordable software would be Cakewalk. I didn't like this program personally but alot of people do. There are some cheap 100-200 dollar programs out there that are simple to use. Hope this helps!