And here are two more sites for Digital Downloads of music:
Sheet Music Direct
http://www.sheetmusicdirect.us/Sheet Music Direct is the digital arm of Hal Leonard Publishing - otherwise known as "Papa Hal" in the music buyer's biz. They seem to concentrate on more pop titles, only featuring "Best of" Broadway music. Which is sort of sad since HL represents Rodgers & Hammerstein, Cole Porter, and even some of the Bernstein, Sondheim and Stephe Schwartz catalog. However...
SMD uses a different browser plug-in to view their music. I believe it is called "Scorch", which is a product of the Sibelius music-notation software.
Then as mentioned above there is Sunhawk:
http://www.sunhawk.comStarted off as the digital arm of Warner Bros. Music Publishing. So, there's lots of Gershwin on the site. Additionally, since Warner bought Valando, you can also get titles from Sondheim and Kander & Ebb on there (some of which are "owned" by both WB and HL). WB/Sunhawk is also the publisher for Ahrens & Flaherty and Stephen Schwartz. -Although both Stephen's - Schwartz and Sondheim - have seem to migrated back to HL over the past couple of years. In any case... Where was I?
Both SMD and Sunhawk have transposing options for more of their music. However...
There is also Music Notes:
http://www.musicnotes/comI'm not exactly sure who MN is associated with publisher wise - just never really looked into it - but they do seem to have an adequate selection of Broadway titles. *They seem to lean toward the HL side of the biz. However, not all MN are able to be transposed. From what I can tell, some of their titles are just actual scans of the original music, while some are entered digitally. When you bring up a piece of music, you'll be able to see whether or not you have the option to transpose. Additionally, MN uses two browser plug-ins: their own MN Viewer and the Sibelius Scorch plug-in. -The Viewer does not transpose, Scorch does.
OH! The Solero plug-in for Sunhawk is not yet Mac compatible. However, if you have Virtual PC or some other sort of PC emulation software on your Mac, then you can use it that way. It's an IE plug-in, and since Microsoft is no supporting or developing IE for Macs... Ah, well. -Which is why I'm always glad I've kept my old laptop. It's a Windows based PC.