Edit (2024.02.03)
Still available in 2024. Oldie and goldie.
-------------------------------------------------------
Tips for further reducing the stuttering and better game performance:
1. In C:\Users\User_Name\Documents\My Games\Fallout3, Fallout.ini look for:
bPreemptivelyUnloadCells=0
and set this value to 1.
bPreemptivelyUnloadCells=1;0
It was recommended in New Vegas section of Nexus (with very good results) and here:
hxxps://www.youtube.com/watch?v=Cypqage_Pdk (video made by request)
You will also find a lot of other tweaks (NVAC use, enb, ini settings, etc.) that works like a charm on Fallout 3, too.
Note:
Even if was suggested in that video, do not set bSelectivePurgeUnusedOnFastTravel to 1.
You might have random CTDs, if you use fast-travel console commands or teleporter mods or change exterior cells to interiors.
2. Starting with version 1.5 of the Fixes, Fallout 3 Stutter Remover is no longer needed.
Use NVAC (New Vegas Anti-Crash system) mod instead.