As technology advances and bandwith + wireless expand like so many galaxies, the possibilities for music creation and listening become nearly limitless. Free possibilities abound. Here are some of my recent favorites/recommendations. Have fun with these.
Music Creation: Notation-Based
Music Creation: Loop-Based
One Motion-drum machine which can be exported as an SWF file.
Music Creation: Web-Based Audio Editing/Hosting
Indaba Music-Make and manage music at this online community.
Myna by Aviary-Use Myna to remix music tracks and audio clips. Apply sound effects and record your own voice or instruments.
Grooveshark-Listen to streaming music in a clean, i-tunes-like interface. Create playlists, see photos of artists.
Songza.com-Listen to streaming music at songza.
Last FM- Search for, Learn about and listen to music by all types of musicians/artists. Doubles as a social networking site.
Pitchfork.com-Music plus reviews, news and features.
Mp3.com- This is a great site for discovering music that is not restricted by copyright. It is also organized by musical style and genre in a clear manner.