Fileion - Fileion is a software-related website where you can download and get reviews software.
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.
JoyDownload - Collection of free software and shareware programs to download
Product Hunt - A website that lets users share and discover new products
IceWalkers - IceWalkers.com provides a vast database of Linux Software.
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