CDSlow is described as 'program to control the speed of CD/DVD/Blu-ray drives. More precisely, to limit the maximum speed of the drive for reducing the noise, when it is not required to read the data very fast (for example, when listening a MP3 music)'. There are 2 alternatives to CDSlow for Windows. The best alternative is Rimhill, which is free.
Rimhill sets the maximum cd-rom speed to a specified level in your drive. This will prevent the annoying sound if a cd-rom is in your drive and also speed up access time if the drive is rarely used since the drive must only spin up to 8x instead of 48x.
Nero DiscSpeed, previously Nero DriveSpeed, is a disc speed measurement and performance diagnostics tool. It reads the speed of a CD-ROM drive. Not included in the Nero 11 or later, is part of Nero Free Tools.