Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
TwelveKeys - TwelveKeys is a music transcription software by NHC which transcripts the music file with a visual representation of notes.
MuseScore.org - Create, play back and print beautiful sheet music with free and easy to use music notation software MuseScore. For Windows, Mac and Linux.
AnthemScore - Convert wav and mp3 to sheet music.
Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.
AmazingMIDI - Free WAV to MIDI converter for music transcription.