Free Software Directory
AlternativeTo
Softpedia
Product Hunt
Filehippo
FileHorse.com
Slant.co
MajorGeeks
Open Source Game Clones
MoreGamesLike.com
Product Hunt
AlternativeTo
Alternatives By TechnoFizi
Alternative.me
App Compear
SaaSHub
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.
MoreGamesLike.com - Most popular recommendation engine for more similar games and recommendation blog.
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
Product Hunt - A website that lets users share and discover new products
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.
Alternatives By TechnoFizi - Find all major games, apps, sites, software alternatives