Over the years, I have collected a large amount of sheetmusic over the internet, and the most popular and often requested has been the transcriptions of Vladimir Horowitz. I am providing a host for these scores, as well as the rest that I have acquired on this site. My online archive is here. I am providing these scores completely free of charge, but I encourage anyone to donate to continue to support this excellent host.
Update:
L. Edson Jeffery has sent me his new version of Horowitz's 1968 Carmen Variations, a rendering of the score which he based primarily on a frame-by-frame analysis of Horowitz's televised Carnegie Hall recital performance.
Update 2:
Mr. Jeffery has also sent in his transcription of Horowitz's performance of Moszkowski's Etude Op. 72, No. 11. The link to the new transcription can be found below.
The score can be found below with the list of Horowitz transcriptions.