This list will be grouped by racing discipline satisfied so that new people don't get overwhelmed with information they can't CTRL+F across.
Want to know more about what makes a mod good or bad? Read more about the topic here
The following are reputable paid modding groups which produce "decent" to excellent content depending on the age of said content. As an example, most of URD's 2016 mods are obviously not on par with their current works in terms of quality. These mods being paid doesn't always mean they're better.
Filtered by Discipline: Fictional | GT | LMP | Vintage Racecars | Road Cars | Tuned - Drift
*WDT/WDTS Cars are mostly not compliant with pipeline standards when it comes to visuals and there are small physics issues that could be fixed later down the line.
*Due to recent developments in the modding community, PPC will (hopefully) temporarily closing down it's mod-releases channel.
Tracks that are handled by competent people with a lot of experience and aren't just obtuse rF2 conversions or RTB abominations.
A few filters that are user-friendly and don't suffer from common issues like overexposure or glare that is a lot brighter than it should be