I use many mods. I'll try and link all of them, however I have so many installed, I may miss some.
Traffic Flow:
Indicator Script:
Spotlight:
IVDashcam:
vdH TowingService (I plan to use this in the future.):
ELS V6: http://gtapolicemods.com/downloads.php?do=file&id=1764
If I missed anything and anyone points it out, please let me know so I can add it to this list!