Fl Studio (formerly titled Fruity Loops, tho some still refer to it as such) is a popular DAW (digital audio workstation) for producing generally computer generated and/or electronic music. It is also rather popular for those looking to do some basic recordings, or that are on a small budget. It is of particular interest to this forum because of the fact that most of the songs posted are created with FL Studio.

The tutorial is rather outdated (written using version 6...) but the basics are still largely the same, and you can download a free demo of the latest version from ImageLine's website http://www.flstudio.com (look for the discrete link at the very bottom that says 'download demo')