iRamDisk 3.6.4 | Mac OS X | 4 MB.
iRamDisk uses a portion of RAM to create a new volume is shown as a common unit, and that can be mounted and used independently in their search.
Since time access to these datas is much faster than usual (which can reach more than 10 times normal speed), this allows you to do some things that would not be able with a classic hard drive, such as getting a incredibly fast writing speed or move the temporary files of some applications (Safari, Xcode, …) rather than when you want to optimize access time, along with minimizing the impact of these files on your SSD.
However, do not forget that the team does not have as much RAM as your disk space and lose the data placed in the new volume when rebooted. Therefore, be careful when using it!