Octopodes
- Mixed a cappella group of Johns Hopkins University specializing in arrangements of current pop tunes. Upcoming events, repertoire, members and alumni, discography, photos and contact information.
- http://www.jhu.edu/octopodes/

Vocal Chords
- Coed group with a varied repertoire of pop and traditional songs. Lots of photos and biographies.
- http://www.jhu.edu/~vchords/

Sirens
- All-female group with a pop repertoire stretching from 60s to 90s.
- http://jhuniverse.hcf.jhu.edu/~sirens/

Ketzev
- Ketzev is a coed Jewish a cappella group that features songs in a variety of languages including Hebrew, Yiddish, and English.
- http://www.jhu.edu/~ketzev/

AllNighters
- All-male group.
- http://www.jhu.edu/~allnight/