Here's the link to the website: http://lmms.sourceforge.net/
Here's the link to a portable version of it from Portableapps.com: http://portableapps.com/node/18823
Note: Even though the title says "Linux" MultiMedia Studio, their latest versions are now available for Windows.
They also have a place where you can share your music. It also supports music made in Fruity Loops.












