MicroAcquire - A free & anonymous startup acquisition marketplace
Idea Hunt - Solve specific challenges for your favorite products
Tiny Acquisitions - Tiny acquisitions is the only marketplace for internet business that are priced under $5,000.
Idealist - Volunteer, work, and intern job search
SaaSPlace - Acquire, invest & sell SaaS products, plugins and apps
OpenVC - 2200+ VC firms by thesis to find 'best fit' for your startup