The New York Historical Society has an exhibit called Remembering September 11th which will be open FREE until the Society officially re-opens on November 11th.
The Museum of the City of New York exhibit Twin Towers and the City will be on view until December.
The 9/11 Peace Story Quilt will be on view at the Metropolitan Museum of Art until January.
The Remembering Sept 11th exhibit at the International Center for Photography is not to be missed.
The Brooklyn Museum Exhibit 10 Years Later is on view until the end of October.
PS 1, MOMA's outpost in Queens, has a September 11th exhibit that will be on view until January.
The Tribute Visitor Center continues its mission.
St Paul's Church continues their ongoing exhibit about their role in the recovery effort.
You can find information about visiting the Sept 11th Memorial site here.