MicroAcquire - A free & anonymous startup acquisition marketplace
Harlow - Harlow helps freelancers get organized, save time, and look professional with automated invoicing, proposal templates, and much more—all from one centralized hub.
Tiny Acquisitions - Tiny acquisitions is the only marketplace for internet business that are priced under $5,000.
Kosmo - Kosmo helps you automate your freelancing business. Including sending invoices, tracking time, managing projects and more.
SaaSPlace - Acquire, invest & sell SaaS products, plugins and apps
Dubsado - Dubsado is flexible — it gives you 5 (now 6!) ways to add new leads. Best of all, 5 ways are automated.