MicroAcquire - A free & anonymous startup acquisition marketplace
Transferslot - Easily buy and sell side-projects
Tiny Acquisitions - Tiny acquisitions is the only marketplace for internet business that are priced under $5,000.
SaaSPlace - Acquire, invest & sell SaaS products, plugins and apps
Flippa - Flippa is a platform for trading websites.
Investors Club - Profitable online businesses vetted & handed right to you