Are you looking for some mods to use with LCPD: First Response?
Well, here are some of the most useful:
(Big thanks to Sgt.Person for providing some of the links in the list and of course the users who have mentioned mods in the replies below that should be added to this list)
Here is a list of the sections that you can find from this list, use Ctrl+F and type/paste the section's name there if you don't want to scroll down to find it.
Notes
Updates
Important Mods
Weapons
Script Mods