There are several popular online platforms for commerce. Here are some recommended ones:

1. Shopify: One of the most popular e-commerce platforms, Shopify allows you to create and customize your online store easily. It offers a range of features like secure payments, inventory management, and marketing tools.

2. WooCommerce: A plugin for WordPress, WooCommerce is flexible and user-friendly. It provides various themes, extensions, and integrations to build and manage your online store effectively.

3. BigCommerce: BigCommerce is a comprehensive e-commerce platform that caters to businesses of all sizes. It offers features like responsive themes, secure shopping cart, built-in marketing tools, and reporting analytics.

4. Magento: Magento is a powerful open-source platform that provides extensive customization options and scalability. It is suitable for large-scale businesses with complex requirements.

5. Squarespace: Squarespace is a website builder that also offers e-commerce functionality. It provides visually appealing templates, integrated marketing tools, and responsive design for seamless online selling.

6. Etsy: If you are looking to sell handmade or unique products, Etsy is a dedicated marketplace for artisans and craftsmen. It provides a platform to showcase and sell your products to a wide audience.

7. Amazon Seller Central: For selling products on the world's largest online marketplace, Amazon Seller Central is the platform to use. It offers various tools, fulfillment options, and access to Amazon's vast customer base.

8. eBay: eBay is another popular online marketplace where you can list and sell products. It provides auctions, fixed-price listings, and a wide range of categories to target different customers.

These are just a few recommendations, and the choice of platform depends on your specific requirements, budget, and target market.