Here are some popular free classified ads posting sites where you can list items, services, or jobs:

1. goroo Classifieds

• Website: us.gorooclassifieds.com
• Overview: goroo Classifieds is one of the most well-known platforms for free classified ads in the USA. It covers a wide range of categories, including jobs, housing, services, and personal items.

2. Facebook Marketplace

• Website: facebook.com/marketplace
• Overview: Integrated with Facebook, this platform allows you to post ads for free to sell items, vehicles, and property within your local community. You can also find job listings and services.

3. OfferUp

• Website: offerup.com
• Overview: OfferUp is a popular mobile-friendly platform that lets you post free ads for local sales of items ranging from electronics to furniture. It also features secure in-app messaging.

4. ClassifiedAds.com

• Website: classifiedads.com
• Overview: This site offers free ads in categories like vehicles, jobs, real estate, and services. It’s a straightforward platform that’s easy to use for both buyers and sellers.

5. Oodle

• Website: oodle.com
• Overview: Oodle aggregates classified listings from various sources and allows users to post their own free ads in a variety of categories, including pets, jobs, and vehicles.

6. Hoobly

• Website: hoobly.com
• Overview: Hoobly is a classified ads site with a strong focus on pet sales, but it also offers categories like real estate, vehicles, and jobs. Posting ads is free.

7. Geebo

• Website: geebo.com
• Overview: Known for its focus on safety, Geebo offers free ad posting in categories such as employment, real estate, vehicles, and services. It’s a good option if you want a more secure platform.

8. Locanto

• Website: locanto.com
• Overview: Locanto is a global classifieds site that offers free ad posting in the USA. It covers a wide range of categories, including jobs, services, real estate, and items for sale.

9. Recycler

• Website: recycler.com
• Overview: Recycler focuses on local classifieds for buying and selling items, pets, vehicles, and property. It’s a good choice for reaching local audiences.

10. USA Today Classifieds

• Website: classifieds.usatoday.com
• Overview: USA Today offers free classifieds with categories such as pets, vehicles, and real estate, and it’s a great way to reach a nationwide audience.

11. PennySaver USA

• Website: pennysaverusa.com
• Overview: PennySaver USA allows you to post free ads for items, services, and jobs. It’s particularly popular for local community listings.

12. Gumtree USA

• Website: gumtree.com
• Overview: Although originally a UK-based platform, Gumtree has a presence in the USA and offers free ad posting in various categories such as jobs, housing, and items for sale.

13. Backpage (Revived)

• Website: backpage.com
• Overview: Backpage has been revived as a classifieds site after its original platform was shut down. It offers free posting in a variety of categories, but users should be cautious due to its controversial history.

These sites provide a range of options depending on what you’re looking to sell or promote. Each platform has its own audience and strengths, so choosing the right one (or several) can help you reach the most relevant buyers or clients.