HoustonShowBiz.com
- Small directory of Karaoke bars and D.J.'s.
- http://www.houstonshowbiz.com/

Guitar Houston
- Non profit classical guitar society. Includes events, society profile, and directories.
- http://www.guitarhouston.org/

Houston Friends of Music - Shepherd School of Music
- Series of chamber music ensemble concerts held at Rice University's Shepherd School of Music.
- http://cohesion.rice.edu/shepherdschool/friends/

Houston Youth Symphony
- Includes upcoming concerts, members, audition information, and contact details.
- http://www.digitaldocuments.net/sites/hys/

Houston Flute Club
- Serves the needs and interests of flutists in Houston and surrounding areas.
- http://www.houstonfluteclub.org/

Renaissance Chamber Strings
- String ensemble for weddings, receptions, and special ceremonies. Provides examples from repertoire, professional experience, and service area.
- http://www.houstonstringmusic.com/

Jazz Houston
- Features forums, news, and listings as well as descriptions of venues.
- http://www.jazzhouston.com/

Houston Graffiti
- Hip hop news and events with a forum and chat.
- http://houstongraffiti.com/

Houston Early Music
- Chartered non-profit organization whose purpose is to present historically-informed performances of early music from the European traditions and other world cultures in concerts featuring internationally renowned vocal, instrumental, and chamber musicians
- http://www.houstonearlymusic.org/

Houston Masterworks Chorus
- Independent chorus performing classical and contemporary pieces.
- http://www.choral.org/grou/hmc/index.html

The Bach Society
- Choral and instrumental Bach music. Most concerts are free.
- http://www.bachsocietyhouston.org/

Opera in the Heights
- Non-profit regional opera company serving the Houston Heights and Greater Houston area with opera and concert performances. Offers ticket information and seating chart, season overview, articles, and photo gallery.
- http://www.operaintheheights.org/

Houston String Quartet and Elizabeth Trio
- Biographies, contact and booking information, and repertoire.
- http://www.houstonstringquartet.com/

Houston Civic Symphony
- Features a concert schedule, listing of people and players, a cumulative repertoire list, and a streaming broadcast of past performances.
- http://www.civicsymphony.org/

Houston Chamber Choir
- A professional vocal ensemble devoted to presenting outstanding works from a wide range of periods and cultures. Its members are selected from the finest choral musicians in the region.
- http://www.houstonchamberchoir.org/

Houston Grand Opera
- Calendar and ticket information. Includes the history of the company.
- http://www.houstongrandopera.org/

Houston Symphony
- News and ticket and performance information.
- http://www.houstonsymphony.org/

Diaz Music Institute Inc.
- Nonprofit Hispanic music organization. Caliente is the institute's youth performance ensemble; it promotes Hispanic music such as Latin jazz, salsa, and merengue.
- http://diazmusicinstitute.org/

Houston Symphony Chorus
- News and ticket and performance information.
- http://www.choral.org/grou/hsc/

Houston Choral Site
- Choral societies and sites for choral enthusiasts.
- http://www.choral.org/