Flippa - Flippa is a platform for trading websites.
One Word Domains - Database of all available one-word domains
Transferslot - Easily buy and sell side-projects
Undeveloped - Domains you never thought were available
AcquireBase - A marketplace for buying and selling side projects & SaaS apps for free. Absolutely 0% commission on successful sales. No paywall for unlocking offers.
Dictionary Domains - Unregistered dictionary word domains for your side project