This is easily one of the most popular mods for Kenshi, and for very good reason. Unarmed, captured prisoners now have a small chance to be recruited -- and they come with their own unique dialog.
This mod also opens up the possibility of recruiting creatures like the Frog Prince and the Error Code robots.
You should note a potential issue, however -- some users have reported problems where turret guards won't actually do anything when you have prisoners in cages while this mod is installed.
In some instances, turret gunners will also shoot at new recruits when you recruit prisoners. In either case, just save and reload to fix the issue.