A small system utility, which shows the size of your Windows swap file and/or free space on your drive in System Tray of your Desktop. With Fmon you are able to prevent system crashes sometimes. You customize Fmon's appearance by selecting different 'skins', choosing one, that suits you best.You can tell Fmon to output the size of another file also, but this is needed rarely. Most users ask Fmon to show free space on a drive only.