Available on the Nexus -- http://www.nexusmods...ut3/mods/20105/
My ENB of choice for Fallout 3, it's fairly recent (early 2014, still maintained) and walks hand-in-hand with the URWLENB FO3 weather mod.
The landscapes are still green-ish and dreary, so it keeps the Fallout 3 look. My FO3 photo album uses this ENB.
I found the installation instructions particularly good, it even comes with a packaged Nvidia Inspector profile and .ini files modifications.