Do you own your own DirectAdmin server? If not, then you should ask your hosting company.
If so, then you should read
here before going further and before deciding whether or not you want to support FrontPage Extensions. In short, it's been marked End-of-Life by Microsoft for over two years.
That said, my recollection is that if you install DirectAdmin with CustomApache it supports FrontPage Extensions but that if you use CustomBuild it doesn't. I could be wrong, though; hopefully others will write here, or you can search the forums.
That all said, you can install FrontPage Extensions on your server using CustomApache; search these forums for more information.
Are you looking for software you can use yourself to write a site or do a site design using FrontPage? If so you may be out of luck; It's closed-source commercial software that Microsoft has discontinued some time ago.
There should be lots of books on FrontPage still available in bookstores, and of course google will help you find lots of help and documentation on the 'net.
Jeff