Royalty-Free Music Generators

1. Soundraw: Creates customizable background music. Choose your desired mood, instruments, genres, and adjust lengths. https://soundraw.io/
   

2. Amper Music: Craft original compositions quickly. Excellent for background tracks, soundtracks, or video scores.
   

3. Jukebox (OpenAI): Generates music with vocals in a variety of genres and artist styles. Still under development, but a very promising project. https://openai.com/blog/jukebox/
   

4. Ecrett Music: Offers royalty-free AI-generated tunes for videos, games, and podcasts. Pick your mood and adjust accordingly. https://www.ecrettmusic.com/
   

5. Boomy: Instantly transform your lyrics and ideas into full-blown songs, with customizable music and styles. https://boomy.com/
   

6. AIVA: Composes emotional, personalized soundtracks for various projects. It learns and adapts to your specific needs.
   

7. Mubert: Produce AI music loops and adjust elements like BPM, intensity, and instruments on the fly. https://mubert.com/
   

8. Chrome Song Maker: Google's basic but engaging music creation tool right in your browser. https://musiclab.chromeexperiments.com/Song-Maker/

Hum to Music Tools

1. Google's AI Test Kitchen: Hum to Search: Hum a melody with no lyrics, and Google's AI will try to identify the song. https://aitestkitchen.withgoogle.com/ (Search for the "Hum to Search" experiment)
   

2. Musixmatch: Melody Search: Similar to Google, hum or whistle a tune, and the app searches its music database for a match!
   

Music Creation for Specific Needs

1. Splash: Specializes in music for podcasts and radio shows. Offers a wide range of intros, stingers, and background tracks created with AI. https://www.splashmusic.com/
   

2. AudioCipher: For creating soundtracks for your video games! It allows you to adjust mood and intensity on the fly. https://www.audiocipher.com/
   

3. Bebot: AI beat generator for hip-hop, trap, and electronic music producers. https://bebot.io/
   

4. Amadeus Code: AI songwriting assistant offering chord progressions, melodies, and even rhyming lyric suggestions.
   

5. Orb Composer: Complex tool for creating advanced orchestral music, with deep control over arrangements and instrumentation. https://orb-composer.com/
   

More Specialized AI Music Tools

1. Humtap: Create drum beats simply by tapping out your rhythm. https://www.humtap.com/
   

2. Lalal.ai: Isolate vocals or instrumentals from existing music with surprising accuracy. https://www.lalal.ai/
   

3. Bandlab: Collaborative music creation platform incorporating AI tools for melody and beat generation. https://www.bandlab.com/