If your goal is to find physical scores for piano, guitar, or ensembles to play energetic pieces:
: Features the world's largest catalog of community-uploaded sheet music. You can find high-tempo arrangements and "energetic" tag-filtered scores for free. Download Energetic Music
If you need high-energy audio for listening or creative projects: If your goal is to find physical scores
: Provides over 500,000 professional arrangements that you can purchase, download, and print instantly in any key. Download Energetic Music
: The go-to for public domain classical scores, including many high-energy orchestral and piano works.