- Oh So Fresh
- The Oak Room - Wiki Article
- Obscure Sound - Wiki Article
- The Ogg Blog Ogg files
- Ohrensause 2010: A song a day, each a second shorter. Jeden Tag ein Song, jeweils eine Sekunde kürzer (in German).
- ONDAFLOR Underground Electronic, HipHop, Reggae and Funk
- On Music Coverage of Milwaukee's music scene from Shepherd Express music editor Evan Rytlewski
- One For The People Good Music Resource: UK based, Worldwide Coverage....
- The One Dollar Man
- Opinears Diverse entries on various genres and eras. World via Chicago.
- Oppgulp.com - Norwegian music blog
- Optivism - The greatest hits from all around the world!
- Orangejello Lemonjello
- Orbiting Onions
- Ōtepoti Music - Streaming music made in Dunedin, New Zealand.
- Our Last Quarterstance
- Out the Other
- Overtone*
- Overtones
- Palms Out Sounds
- The Owl & The Bear - Wiki Article
- One Girl's Very Biased Opinions on the Punk/Electro/Experimental Band Scene