Washington Sinfonietta
- News, schedule, music director profile, sponsorship, rehearsal and ticket information.
- http://www.washingtonsinfonietta.com/

Post-Classical Ensemble
- Performs fine music in the context of its cultural heritage, including folk song, dance, film and contemporary popular music. Includes schedule, profile, director biographies, contact and subscription information.
- http://www.post-classicalensemble.org/

Endymion Ensemble
- Specializes in repertoire ranging from Baroque to contemporary that because of its unusual size or instrumentation is seldom performed. Includes upcoming concerts, personnel, mailing list and links.
- http://www.endymionensemble.org/

Bach Sinfonia
- Period-instrument chamber orchestra provides concerts, lectures and discussions to enhance understanding of the variety of styles, composers and masterpieces of the Baroque, pre-Classical, and Classical eras.
- http://www.bachsinfonia.org/

Virginia Chamber Orchestra
- Forty-member group performing in communities throughout the Washington metropolitan area and Virginia. Includes season schedule, profiles, reviews and outreach programs.
- http://www.virginiachamberorchestra.org/

Eclipse Chamber Orchestra
- Composed primarily of members of the National Symphony Orchestra with the goal of making concert performances accessible to all audiences. Includes season schedule, history, personnel, reviews and ticket information.
- http://www.eclipseco.com/