IMSLP has added a membership plan. All scores will still be available for free to non-subscribers.
For an overview of the membership plan see IMSLP:Membership Q&A.
For more information on the reasons behind this change, see this announcement on the IMSLP Forums.
Please note that some newly-uploaded scores may only be available after a day or two to non-subscribers.
Free public domain sheet music from IMSLP / Petrucci Music Library
The IMSLP Star is hereby awarded to you in recognition of your wonderful scans!
The Cleanup Star is also awarded to you for your fabulous work with composer composition lists, pictures, and more!