Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.
Flippa - Flippa is a platform for trading websites.
MakerWidget - An embeddable portfolio for your (side) projects
Transferslot - Easily buy and sell side-projects
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
AcquireBase - A marketplace for buying and selling side projects & SaaS apps for free. Absolutely 0% commission on successful sales. No paywall for unlocking offers.