Finale: Music notation software including Finale Notepad, the freeware version of Finale.
Forza!: Plug-in collection for Finale 2000 and later versions.
Leadsheet: For Finale PC users, this freeware application converts the chord symbols from a Band-in-a-Box file into the Finale 97/98 ETF format.
Resource List, by RPM Seattle Music Prep: Includes Finale plug-ins, fonts, books, and music publishing and typesetting resources.
TGTools: A comprehensive collection of plug-ins for both Mac and PC. By Tobias Giesen.