There are tons of companion mods out there, but I'm having a bit of trouble finding one specific companion mod I played years ago, around the time of my brief period of modding around 2010-2011. There were about a hundred or so companion npc's scattered around the various vanilla towns which the player could find and hire. It was possible to add them all and build a small army! Does anyone know which mod I might be referring to?

Sounds like Partners.

Agreed - http://mw.modhistory.com/download-24-5946.