Here are the two direct download links (zip files):
Daggerfall: http://cms.elderscrolls.com/sites/default/files/tes/extras/D…
Arena: http://cms.elderscrolls.com/sites/default/files/tes/extras/A…
You will need a DOS Emulator to play them.
Maybe use the DosBox frontend D-Fend: http://dfendreloaded.sourceforge.net/index.html?lang=en
I am also not sure when this expires so it may well be available past Sunday.
Hope you have fun with some good old Elder Scrolls.
It's been free since 2009. Won't expire, as it's now abandonware.
Here are additional links for patches and modifications for the game.
http://www.uesp.net/wiki/Daggerfall:Files
You may / may not be interested in Wikipedia's big list of commercial video games released as freeware
NesBox.com also used to be a good site to play old SNES games on, but their ROMS were removed for copyright infringement. You can still play old NES games in browser but I won't provide any links — google it yourself.