This is a list of online music databases, as well as including a list of sites that currently provide free and paid-for on-demand music as a streaming media. A primary unit of many of these two types of sites is the tracks which is often referred to in the marketplace simply as a song.

Below is a table of online music databases that are largely free of charge. Note that many of the sites provide a specialized service or focus on a particular music genre. Some of these operate as an online music store or purchase referral service in some capacity. Among the sites that have information on the largest number of entities are those sites that focus on discographies of composing and performing artists.

The following is a list of online music stores that currently offer some free on-demand music streaming of full-length content over the Internet as a part of their service without the listener necessarily purchasing a file for download. One might compare this type of service to internet radio. Many of these sites have advertising and offer non-free options in the style of an online music store. For a list of online music stores that provide a means of purchasing and downloading music as files of some sort, see comparison of online music stores. Many of both types of sites offer browsing by song title, artist, etc. that amounts to a form of online music database.

Streaming media is multimedia that is constantly received by and presented to an end-user while being delivered by a streaming provider. With streaming, the client browser or plug-in can start displaying the data before the entire file has been transmitted. The name refers to the delivery method of the medium rather than to the medium itself. The distinction is usually applied to media that are distributed over telecommunications networks, as most other delivery systems are either inherently streaming (e.g., radio, television) or inherently nonstreaming (e.g., books, video cassettes, audio CDs). The verb "to stream" is also derived from this term, meaning to deliver media in this manner. Internet television is a commonly streamed medium. Streaming media can be something else other than video and audio. Live closed captioning and stock tickers are considered streaming text, as is Real-Time Text.

Live streaming, delivering live over the Internet, involves a camera for the media, an encoder to digitize the content, a media publisher, and a content delivery network to distribute and deliver the content.

Andre Romelle Young (born February 18, 1965), better known by his stage name Dr. Dre, is an American rapper, record producer, record executive, entrepreneur, and occasional actor. He is the founder and current CEO of Aftermath Entertainment and a former co-owner and artist of Death Row Records. He has produced albums for and overseen the careers of many rappers, including Snoop Dogg, Eminem, 50 Cent and Game. As a producer he is credited as a key figure in the popularization of West Coast G-funk, a style of rap music characterized as synthesizer-based with slow, heavy beats. As of 2011, Dr. Dre is ranked as the third richest figure in the American hip hop scene by Forbes with a net worth of $250 million.

Dre began his career in music as a member of the World Class Wreckin' Cru and he later found fame with the influential gangsta rap group N.W.A with Eazy-E, Ice Cube, MC Ren, and DJ Yella which popularized the use of explicit lyrics in rap to detail the violence of street life. His 1992 solo debut, The Chronic, released under Death Row Records, led him to become one of the best-selling American performing artists of 1993 and to win a Grammy Award for the single "Let Me Ride". In 1996, he left Death Row to establish his own label, Aftermath Entertainment. Under that label, he produced a compilation album titled Dr. Dre Presents the Aftermath in 1996, and released a solo album titled 2001 in 1999, for which he won the Grammy producer's award the next year.

Lawrence "Larry" Page (born March 26, 1973) is an American computer scientist and internet entrepreneur who, with Sergey Brin, is best known as the co-founder of Google. On April 4, 2011, he took on the role of chief executive officer of Google, replacing Eric Schmidt. As of 2012^[update], his personal wealth is estimated to be $18.7 billion. He is the inventor of PageRank, which became the foundation of Google's search ranking algorithm. Together, Brin and Page own about 16 percent of the company's stake.

Larry Page was born in Lansing, Michigan. His father, Carl Page, earned a Ph.D. in computer science in 1965 when the field was in its infancy, and is considered a "pioneer in computer science and artificial intelligence." Both he and Page's mother were computer science professors at Michigan State University. Gloria Page, his mother, is Jewish but he was raised without religion.

Page attended the Okemos Montessori School (now called Montessori Radmoor) in Okemos, Michigan from 1975 to 1979, and graduated from East Lansing High School in 1991. He holds a Bachelor of Science in computer engineering from the University of Michigan with honors and a Master of Science in computer science from Stanford University. While at the University of Michigan, "Page created an inkjet printer made of Lego bricks" (actually a line plotter), served as the president of the Eta Kappa Nu in Fall 1994, and was a member of the 1993 "Maize & Blue" University of Michigan Solar Car team.