Buy Sibelius and download it to your computer (See Resources). You can start with its free trial offer. Sibelius allows you to scan your handwritten music scores to change it to typed sheet music to print out. It also includes special notations like figured bass, transposing instruments and guitar tab.
Purchase or download the free trial of Finale (See Resources). There are separate versions of this software for professional musicians, students and music teachers. There are also simpler versions of Finale such as Finale Print Music, Finale Allegro and Finale SongWriter.
Download Musictime Deluxe by GVOX (See Resources). With this software, you can make scores, notated sheet music with a maximum of sixteen staves using up to eight different instruments per staff and arranging notes and rests on your scores wherever you want.