Cocorico - Cocorico is a state-of-the art Open Source solution to create an Airbnb or Blablacar for anything.
Smart Job Board - Job board software
Sharetribe - Build your online marketplace business. You don't need a developer.
RealMatch - RealMatch is an online recruitment company that builds a recruitment advertising network to connect employers with job seekers.
JaJuMa-Market - All-In-One Multi-Vendor / Online Marketplace Solution. Various Business Models supported.
Jobiqo - Jobiqo is an Austrian-based company providing job board software solutions to companies.