Are WOFF (Web Open Font Files) accessed only via browsing to websites that use them, or are they downloadable, and usable, in other words, convertible so that they can be recognised as True Type Fonts for use in office or DTP applications that can also make use of them?

MacMini 1.5GHz,10,2,64MB VRAM,1GB,Airport, Bluetooth,A1016 Keyboard,T-RB22 Mouse,DVD-RW-DL+CD-RW,Iomega MiniMax,Belkin 6 port 3 x Firewire/3 x, USB2, MorphOS 3.12, Mac OSX 10.4/10.5, A1138+A1139 PwrBk MOS v3.12,Model 5,8/5,9, & PowerMac G5 2.3GHz(DP)