SmartScore - Scan, edit and transpose your music in just minutes.
PlayScore - Scan sheet music, play it on your phone and convert it to MIDI or MusicXML
NEURATRON PhotoScore - Music scanning & PDF to notation software.
SharpEye - SharpEye Music Reader converts a scanned image of printed music into a MIDI file, a NIFF file, or a...
PhotoScore Ultimate - used for optical music recognition
OMeR - OMeR is the printed music recognition add-on for Melody Assistant or Harmony Assistant.