Many online slot companies have evolved during the Internet boom. Some were manufacturers of fruit machines, and others have exclusively developed games for online casinos. There are now some big, established software developers providing casino games along with numerous small companies who create and supply them. Amongst the top three brands is Microgaming, one of the longest standing online casino software providers. Another key player in the industry is Playtech, who also provide software solutions for various other iGaming options, such as bingo, poker and sports betting. Probably the most well known and a new breed of casino slots developer is NetEnt. They do not provide downloads, as their games are developed exclusively for instant play in the browser. A wide selection of the games has also been optimised for use on mobile devices. The casino slots from this provider are best known for including innovative features and exceptionally high-quality sound and graphics.