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.
Startup Stash - A curated directory of 400 resources & tools for startups
Product Hunt - A website that lets users share and discover new products
Startup Buffer - Startup Buffer is a premium startup directory for emerging startups all around the world.
Alternative.me - Welcome to alternative.me, the source of better software alternatives. Finding suitable software was never easier.
Makerbook - A directory of the best free resources for creatives