Product Hunt - A website that lets users share and discover new products
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.
Alternative.me - Welcome to alternative.me, the source of better software alternatives. Finding suitable software was never easier.
Softpedia - A library of over 1,000,000 free and free-to-try applications for Windows, Mac, Linux and Smartphones, Games and Drivers plus tech-focused news and reviews
Filehippo - Filehippo is your key to opening files that Windows claims are "in use by another user" or simply "can't be found." Avoid the hassle.
Open Source Game Clones - This site tries to gather open-source reimplementations of great old games in one place.