Product Hunt - A website that lets users share and discover new products
Side Project Stack - Get the best tech stack to make your next Indie Maker App
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
Fazier Sideprojects - Share & discover side projects.
BetaList - BetaList provides an overview of upcoming internet startups. Discover and get early access to the future.
SecondFounder - Easiest way to buy & sell side projects and meet founders