Product Hunt - A website that lets users share and discover new products
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
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.
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.
OpenGrok - OpenGrok is a fast and usable source code search and cross reference engine.
Software Informer - Software Informer is your personal guide into the world of software: latest news, free software downloads, editorial reviews and much more.