I need to purchase a new booster seat so I want to check the ratings on them. Consumer Reports charges a fee for this. Are there any online sites where I can look at safety ratings for free? BTW, I am looking at the Cosco Gotham booster seat if anyone has experience with it. Thanks!

Your local library may offer links on their site to these sites for free with a library card number. YMMV but check it out.

I have membership to consumer repts. If you want pm me and I can look up for you. :)

Consumer Reports rated the following toddler booster seats:
Eddie Bauer High Back Booster (Cosco) $100 - Rated 84/100
Safety 1st Vantage Point SE High Back Booster $95 - Rated 81/100
Cosco Summit High Back Booster $80 - Rated 79/100
Evenflo Chase DLX $70 - Rated 77/100

Consumer Reports rated the following regular booster seats:

CR Best Buys: (High performance and a good value)
• Graco Backless TurboBooster , $20
• Cosco High Rise Booster , $15
• Cosco Protek , $35

High Back Booster Seats:
Graco TurboBooster 8493 - All Rated 82/100
TurboBooster SafeSeat (Step 3) 8496 $50
TurboBooster SafeSeat (Step 3) 8497 $50
TurboBooster SafeSeat (Step 3) 8498 $50
TurboBooster SafeSeat (Step 3) 8673 $60
TurboBooster SafeSeat (Step 3) 8674 $70
Recaro Start $350 - Rated 80/100
Compass B500 $70 - Rated 78/100
Cosco Protek $35 - Rated 74/100
LaRoche Grizzly Bear Booster Seat $115 - Rated 74/100

No Back Booster Seats:
Graco Backless TurboBooster $20 - Rated 92/100
Cosco High Rise Booster $15 - Rated 84/100