Sharetribe - Build your online marketplace business. You don't need a developer.
JaJuMa-Market - All-In-One Multi-Vendor / Online Marketplace Solution. Various Business Models supported.
Arcadier - Build an online marketplace in minutes, no coding required.
Retaxis - Look no further if you are planning to start an online store or a multivendor marketplace which allows you to sell worldwide.
Kreezalid - Marketplace building solution for small to midsize firms
Hatch.li - Create your marketplace business in 48 hours without code and accompanied by a Hatch expert.