The first group of movements for Mussorgsky's Pictures at an Exhibition have been posted at The Mutopia Project. I typeset all but the first promenade. The rest will be uploaded over the coming months. There is currently no one PDF with all the movements; that will come at the end.
The PDFs have a Share and Share Alike license from Creative Commons, which means basically that you can print and play the music all you like and you can use the typesetting in a derived work as long as you give an attribution and keep the source available.
Take a look around The Mutopia Project for more sheet music, all of which is free, both in the senses of freedom and cost. I contribute to them as a public service and for fun. (Yes, I typeset music for fun.)
The PDFs have a Share and Share Alike license from Creative Commons, which means basically that you can print and play the music all you like and you can use the typesetting in a derived work as long as you give an attribution and keep the source available.
Take a look around The Mutopia Project for more sheet music, all of which is free, both in the senses of freedom and cost. I contribute to them as a public service and for fun. (Yes, I typeset music for fun.)