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.
PrivacyToolsList - free open source tools, apps, services for digital life privacy and real life privacy and anonymity
Alternative.me - Welcome to alternative.me, the source of better software alternatives. Finding suitable software was never easier.
DNS leak test - Test your connection for DNS leaks.
Product Hunt - A website that lets users share and discover new products
Opensource Builders - Find open-source alternatives to commercial apps